(A/N: This is the first of the extra chapters everyone has been insisting I explore instead of ending at chapter 3. We will go as far as 7 or 8, depending on how chapter 7 goes. Regardless, there will be sneak peek chapter showing you what I got planned for the next story. Thanks again for your support. It gives me the motivation to keep writing. Please share your thoughts in your review.)

Chapter Four: Our Little Dirty Secret

It had been a few days since Anna was last with Elsa in her room. Almost a week. Anna felt the need to distance herself from Elsa. What they were doing wasn't normal, but it felt so right. They were sisters, yet were doing so much more. There was a confusing mixture of feelings flooding her. It was like she was in the middle of a raging storm. The storm flooded her and enveloped her. She distanced herself from Elsa hoping the distance would make everything seem small.

What would their parents think if they ever found out? What would Kristoff think? Anna had to admit to herself that doing something so forbidden and keeping it a secret from everyone made it even hotter and she wanted to do it with Elsa even more. These feelings she was experiencing towards Elsa were not normal. They caused her to get hard and aroused just looking or thinking about Elsa and what they've already done. The taste and feeling of Elsa's lips as she suddenly kissed Elsa in her car. The feeling of those perfect lips wrapped around her throbbing member in Elsa's room as she gave her the greatest blowjob she ever felt. It was her first, true, but it ruined her for anyone else. No one else would ever be able to satisfy her better than Elsa. No one.

Despite how good it made her feel, Anna still fought and resisted her feelings. She went out of her way to stay clear of Elsa. The two haven't talked since the night in Elsa's room. She could feel Elsa's eyes watching her a few times. She dared not look, afraid her resolve to stay away would crumble and she would need to do something nasty again. She didn't know what Elsa had planned when they last talked about what they were going to do. Elsa took charge and was secretly preparing something. Whatever it was, Anna could tell it excited her older sister. However, Elsa wouldn't tell her.

Anna smiled when an idea came to her. Anna hated knowing people were keeping secrets from her. So, Anna was going to torture the secrets out of her sister. There was only one problem, their parents were in the room same as Elsa.

Elsa was cooking breakfast. Their mother, Iduna, was washing dishes. Their father, Agnarr, had already finished his breakfast and was enjoying his cup of coffee while wearing his glasses as he read his morning paper. Anna twitched inside her boxers when Elsa lit up, noticing her. With a smile, she greeted Anna, "Good morning, Anna. I made you breakfast. It's on the table." There was a very subtle hint of flirting in Elsa's face, making Anna blush.

Anna looked over and saw her plate sitting across from their father before looking back at Elsa, "Okay. Thanks." Anna noticed Elsa's clothing. She was still wearing her nightdress. Her velvet one. Although, Anna thought Elsa was always beautiful, she thought the velvet silk night dress made her even more beautiful. The way it brought out the color of her eyes and the sexy curves of Elsa's body. Anna walked past her to get some milk. The cabinet by Elsa's legs was where they kept glasses. Since a small island space for preparing food hid Anna from the sight of her parents, Anna dared to start tormenting Elsa right then and there as she casually looked for a glass.

Elsa was cooking, fully aware of her little sister's presence but not of what Anna planned to do to her. Suddenly, she flinched with surprise feeling Anna reach up her night dress and play with her pussy while slightly lifting up her night dress to give her plump ass cheeks a few seductive love bites. It felt so good, yet Anna's touch disappeared as soon as Elsa was just getting aroused.

Without a smile or a look at Elsa, Anna grabbed her glass and casually got her milk and sat beside their father. The whole time, Elsa stared at Anna with shock that she could be so daring with their parents in the same room. Elsa silently smirked at how coy Anna was being, acting like nothing happened, how she teased Elsa and left so quickly. Elsa smiled as she made her own plate. Anna's declaration of war aroused Elsa and gave her the courage to repay her with torment of her own. Okay, Anna. I'll play your dirty little game.

Anna had expected Elsa to leave the room to compose herself, but was surprised to see her sit beside her with her plate and start eating it with a fork. Anna began to wonder if maybe she should've done a tad more to tease Elsa, but their parents were right there. Too deep in thought, Anna failed to notice Elsa's right hand snaking across her thigh to her concealed member until it was too late. Anna wanted to moan, but buried the urge by stuffing her face with as much of her breakfast to help mask her pleasured moans as satisfied moans over the delicious food.

Their father chuckled, "My thoughts exactly. Terrific breakfast, Elsa."

Elsa giggled, Clever. Let's see how you react to this. Without warning, Elsa's hand that was stroking Anna through her boxers gripped her hard erection firmly, making it twitch with arousal in her hand before removing it.

"Anna? Are you alright?" their mother asked.

"Yeah. Yeah. It was just…really hot. The food, I mean," Anna quickly answered, giving Elsa a look.

Only Elsa got the innuendo behind Anna's words and giggled, "Well next time, you should blow on it. Or do you need someone blow on it for you?"

That suggestive statement made Anna twitch with lustful want under her boxers. Again, their parents were oblivious to the innuendo and took it as the start of a fight. "Okay, Elsa. Let's watch how we speak to each other. I'm sure Anna learned her lesson."

Elsa just gave Anna a smug smile and replied, "Good." It was then that Anna knew Elsa was paying her back for what she did just a few minutes ago. She finished her breakfast and gave her dishes to her mother so she could find Elsa. There was no way she was going to let what Elsa did slide. She was going to make her cruel big sister pay and pay with screams. The anticipation made Anna tremble with lustful excitement. She entered Elsa's room but Elsa wasn't there.

Confusion overwhelmed Anna, causing her to scan the room for her sister, "Where is she?" There was sexual frustration building up in Anna. After what Elsa did, Anna needed release very bad and she was determined to take it out on her cruel big sister. Anna heard the floor creek behind her and the door closing and locking, but when she turned, she was tackled and pinned under Elsa's body.

"Right here, you cruel little girl," Elsa hissed behind her aroused smile. She was positioned between Anna's legs. Elsa reveled in how much torture she was putting Anna through, her flat stomach feeling Anna's large member twitch eagerly beneath it. Anna wanted her bad, but Elsa was in control and was going to rile her naughty little sister more. Anna was going to regret challenging her. Elsa smiled and leaned closer to Anna's ear, whispering with a seductive whisper, "You're such a bad girl, Anna, doing that with our parents in the same room after ignoring me for the past few days."

Anna whimpered, feeling Elsa's breath ghost her ear and neck. Elsa's body was so soft and warm against her's that it made her erection even more painful.

"I think Big Sis needs to teach Anna a lesson by punishing her," Elsa whispered before pulling away so she could enjoy the sight of her little sister writhing in sexual agony beneath her.

All Anna did with Elsa was kiss in Elsa's car and Elsa giving her a blowjob in her room. However, according to Elsa, they did so much more that night, but Anna couldn't remember it since it was the result of one of her stronger disorder episodes. She fucked Elsa. That was why Anna felt so aroused by Elsa's presence the next morning. She may not remember what they did but her body did and wanting to do it again and again and again. "Elsa…please," Anna whimpered with want and desperation.

Elsa giggled, still pinning her to the floor. She leaned closer to Anna's lips, tempted to kiss her sister's lips again. "Please what?" Elsa asked, playing innocent.

"You said we fucked that night," Anna explained as calmly as she could but her voice only came out as strained due to the unreleased tension building up within her. "That's why I feel these feelings for you. You knew well of my condition and didn't stay away. You did something with me and it's not fair that I can't remember it!" Anna was starting to tear up, making Elsa's playful moon disappear and replace with guilt. "Please, Elsa. I want to be inside you. It's all I can think about. It's eating me alive. Nothing I do is enough. I don't know what else to do." Her tears finally escaped the corner of her eyes and onto the floor.

Elsa leaned down, removing her hands from Anna's wrists to wipe her tears away and place her lips on Anna's, sharing a heated kiss. Just as Anna was about to snap and take her big sister, Elsa pulled away and pushed down on Anna's chest with her weight, "Okay, but not now. Mother and Father will hear us. We have to wait until they leave the house for their anniversary date this evening."

"But-" Anna protested, bucking her hips against Elsa's.

Elsa had to keep Anna pinned again, "No buts. You know we can't let them know. You'll have to do something to take your mind off of it. Avoid touching yourself. Just hold out until tonight, then I'll be yours. Okay?"

Anna had no choice. Elsa was right but it wasn't what Anna wanted. She forced herself to nod yes. And Elsa got off of her and offered a hand to help Anna up. Anna didn't take it, getting up herself and leaving for her room. Anna needed release, but Elsa was denying her until they were alone that night. Elsa didn't want her pleasuring herself but to save that sexual energy for tonight. Anna understood, but that didn't help Anna. She needed to cool down. She locked her door and grabbed her phone and texted Kristoff.

Kristoff, I need your help. She waited for his response, fearing he was too busy with work to answer.

Hey, Feisty Pants. What's going on? She was so relieved. Kristoff may be aware she has a penis and they may have compared sizes, but they didn't have conversations about what to do when horny.

I'm horny as hell and need to cool down. What do I do? She couldn't tell him about Elsa so she withheld that information.

Don't you usually go to the bathroom to jerk off? He was a little surprised by her text. They never talked about certain things, but Anna was his friend and he was happy to help.

No! I can't do that today. Anna replied and begged God not to have Kristoff ask why. Her relationship with Elsa was a secret and Anna was determined to honor Elsa's sole request.

WHY?

Shit, Anna thought.

You don't strike me as the No Nut gal. What brought this on?

Anna hesitated. Nothing. Just want to test my restraint? You got a dick right? What do you do if you don't want to nut?

Kristoff read and just glared at Anna asking if he had a dick. YES, Anna. I HAVE a dick. I'm a guy after all. Are you trying to pick a fight with me?

Are you going to help me or do I have to do something nasty to your stuffed dog, Sven?!

Kristoff was startled by her threat. He had to tell her about his stuffed dog Sven that he had since he was little. You wouldn't.

Try me. I'm feeling exceptionally horny today.

Anna smiled in her strained state as Kristoff began texting her ideas. He said the best was a cold shower. Anna didn't bother reading the rest. She ran for the bathroom, ripped the clothes off her body and ran the show as cold as she possibly could. Anna loved taking hot showers, but was not prepared for the new experience. She jumped and screamed as the cold water sprayed on her. She focused hard, trying to bare it as she slowly moved her body so that her throbbing dick was on the receiving end of the cold shower. So cold. So damn cold! Despite the unpleasant experience, Anna felt it working. Her horny mind was relaxing since it was so focused on the cold stimuli. In time, her suffering ended. Happy, she texted Kristoff. It worked! I'm free!

Kristoff replied, You're welcome. No need to bow.

Anna got dressed and unexpectedly met Elsa in the halls. Elsa looked a bit confused and surprised. "You look better than earlier. How are you feeling?"

Anna looked at Elsa with a smile, "Much better. Kristoff said to take a cold shower."

Elsa quickly took her by the wrist and asked urgently, "You didn't tell him…did you?"

"No," Anna quickly replied. There was relief on Elsa's face but Anna had to ask, "How long do we have to keep us a secret from our parents and others?"

Elsa met her concerned eyes with a similar expression of her own before looking back forward as they walked down the hall for the stairs. Anna's pace slowed, discouraged by Elsa's silence as she walked on. Elsa stopped and answered truthfully with her back facing Anna. Elsa sighed, "I don't know. Same sex couples are common in the world, but…siblings?" She turned to Anna, "Do you really think people now days would be so accepting and supportive of what we're doing?"

"We could just tell people closest to us?" Anna suggested, stepping closer to her big sister and holding on of her hands.

Elsa smiled briefly before replying, "Maybe, but for now. We have to keep it between us until we figure out what to do."

Anna nodded.

Evening came. "ANNA! ELSA!" their father yelled from downstairs. Elsa ran down the stairs, but Anna slid down them, flying into Elsa and on top of her. Elsa could feel Anna twitch under her pants. Anna could feel it too and the two quickly stood up to face their parents as they stood by the front door, ready to leave to celebrate their anniversary.

"We'll be back tomorrow morning. I left money on the counter so you two can get something for dinner if you're hungry," their mother said.

"Okay. Have fun," Elsa smiled, giving her and their father a hug.

Anna hugged them both their parents at once and teased, "But not too much fun. Don't bring home another baby."

Iduna gasped and gave her a shocked smile while Agnarr played with Anna's hair and replied with a wink, "No promises."

Iduna blushed as she was guided out the door by her husband. Once the door was closed and Anna watched the car disappear from their driveway, she turned to give Elsa a playful smile.

Elsa blushed and took a few steps back and took off as her horny little sister ran after her like a wild predator. Their house was filled with the sounds of them running, Elsa screaming and laughing whenever she managed to escape Anna's reach. In the time since they've last been intimate, the distance Anna had tried to put between them only made both want the other all the more and it was becoming apparent to Elsa as Anna managed to grab her briefly, sending pleasurable waves throughout her body and hearing the frustrated growl escaping Anna's lips when she lost her grip on her.

Anna wanted her bad and Elsa felt the same way, looking forward to their night together without their parents. Elsa could barely contain herself as she ran, but a part of her just wanted to turn towards her sister and let the horny sibling pounce on her and fuck her right then and there. She remembered how Anna's enormous dick felt inside her and wanted to feel that feeling of being filled and complete again. However, in the meantime, she was going to hold out as long as possible to torment her sister even more.

Elsa obstructed Anna's path by knocking something over, managing to get ahead and get in Anna's room. She made sure Anna saw her go in as she rushed to catch up with her. Anna stormed in and came to a halt, seeing Elsa standing with her back to the bed, staring with lust in her eyes at Anna. Elsa could already see the younger woman's gears turning, planning all the wild things she was going to do to her once she had her pinned beneath her. Finally, Anna lunged at Elsa, unable to wait any longer, but Elsa dodged to the side and pushed Anna onto the bed so she could run for the door and escape.

However, Anna was quick to recover and bounced off the bed onto Elsa before she could make it out the door. Anna quickly moved Elsa's braid and titled Elsa's head to expose her neck so she could plant soft kisses and love bites. The sound of her beautiful big sister moaning provoked Anna to do more. It excited her so much that Anna was hard. Having Elsa pinned on her stomach, Anna began to grind her erection against her ass. Both were moaning loudly and Anna's grinding quickened. Anna leaned in so she could whisper in Elsa's ear while nibbling on her earlobe. "Can't you feel how hard I am for you, Elsa?"

Elsa nodded. "Yes."

"How good was I that night?" Anna's whisper was so smooth, her warm breath ghosting her neck and ear.

"I want you. Only you," Elsa whimpered. Elsa never had sex before that night with Anna. True she touched herself, but that was nothing compared to having Anna slam her big dick in and out of her. It completely ruined her for anyone else.

Hearing Elsa confess how bad she wanted her made Anna tremble and her erection strain against her boxers. She pressed the head of her swollen member into Elsa between her legs but the clothing they both wore shielded Elsa from being impaled. "Wouldn't you like to feel me inside of you again? I know you want to. Tell me, Elsa. Tell your little sister to fuck you."

The last of Elsa's resolve to tease Anna faded and her shaking hand snaked to the button of her pants beneath her. "Would you like to help me, Anna?"

Elsa positioned herself, letting her ass stick up in the air for Anna. She smiled and braced herself as she felt Anna growl as she eagerly removes Elsa's pants and then her white thong. The sight of her sister before her, paralyzed her. It was so perfect.

Elsa glanced at Anna over her shoulder and giggled, "Well?" She wiggled her ass to tease Anna. "Don't you want your big sister?" She finished with a giggle.

Anna wanted this. Now that it was here, she was having difficulty acting on it. Was it because they were sisters and she was secretly resisting this? Anna didn't know.

Elsa's smile faded, seeing Anna's hesitation. She sat up so she could reach with her hands and hold Anna's face. "I'm sorry, Anna. If you don't want-" She was cut off when Anna crashed her lips into her's and pushed her back on her back. Elsa watched as Anna quickly stripped her boxers off, allowing her ten-inch erection to spring free and hit her stomach. She quickly climbed on top of Elsa, positioning herself between her long, slender legs. Anna crossed her arms over her stomach before lifting her shirt off over her head. Anna was on Elsa faster than Elsa could react, kissing her lips with a hungry passion before moving down her body, ripping Elsa's shirt as she gorged on her big sister's heavenly body, leaving hickies.

It felt so good that Elsa's body was reacting on its own from the pleasure. Elsa' gasped, whimpered and mewled loudly. Her back arched. Her hands were gripping Anna's hair tightly as Anna began to lick her wet opening, eagerly lapping up her juices as they flowed freely from her slit. Anna was aroused by Elsa's scent and the sounds of her arousal, her mewling and the claps of wet skin as Anna ate her out. Anna had been holding back all day and had so much planned for Elsa. She was going to do all of it.

Elsa finally came and Anna was quick to clean her up with her tongue, but not before drenching her fingers in Elsa's cum. Elsa's eyes widened in shocked anticipation before Anna plunged a finger into her sister. Elsa instantly reacted by crying out and wrapping her legs around Anna's waist. Elsa was shocked by Anna's actions as she slowly added two more fingers and varied the pace and angle. Anna was so experienced compared to Elsa. How? Elsa had so many questions but she couldn't form a single coherent word. She was close. Elsa could feel the heat gathering in her lower stomach. "Anna, I'm gonna-"

"Cum for little sister," Anna said with such a sultry voice as she quickened her pace with her fingers to finish Elsa off. It was enough to force Elsa over the edge and cum all over her hand. Elsa was a panting, sweaty mess beneath her, a sight Anna cherished because it was her who did that to Elsa. Elsa looked so beautiful with her skin glistening from the thin sheen of sweat that had covered her body.

"You look so beautiful, Elsa," Anna let out, looking down at Elsa with blushed cheeks. Elsa blushed from Anna's praise and smiled.

Elsa looked at Anna's straining dick and was eager to have that next but Anna got off of her and walked past her for the bathroom door. Elsa felt so confused and sat up, "Anna? Where are you going? I thought-" She remembered Anna's plea to be inside Elsa and she was completely willing to grant her little sister's request.

Elsa wanted Anna inside of her again since the first time, but she could never make that request, even when their relationship as sister became much more sexual. Elsa couldn't find the words. You wouldn't believe the joy she felt in her heart hearing Anna's confession that morning, that she wanted to be inside of her. Elsa wanted to grant Anna's request right then and there, but she had to hold back since their parents were still there in the kitchen below. She had to be strong for them both, just until they were alone. But Anna didn't take the opportunity. Seeing Anna walk away from her, it left Elsa feeling all sorts of things.

It all became clear when Anna peeked at her over her shoulder as she entered the bathroom. Elsa's eyes widened when she saw Anna smile. Elsa smiled before rushing in after her. Anna was in the shower with the hot water running. Elsa got in with her and grabbed her dick from behind. "As much as you want to be inside me, I want it more," Elsa growled as she stroked Anna's member and bit her neck to leave a hickey of her own. The pleasure caused Anna and Elsa to both fall down inside the shower, but managed to avoid getting hurt since Elsa cushioned Anna's fall.

Anna quickly climbed on top of her and forced her legs open before plunging into Elsa as deep as she possibly could. This caused Elsa to yelp and wrap her arms and legs around Anna as Anna pounded into her like a wild animal. Each thrust struck a sensitive spot deep inside Elsa, making her see stars. Anna reached in between them and rubbed her clit and erected nipples, cause overlapping waves of pleasure to consume Elsa. The hot water falling on them both acted as a lubricant to allow Anna to slide right in and go deeper. Both were mewling with pleasure as they had sex. Anna thrusted into Elsa's eager pussy as Elsa bucked her hips in time with Anna, causing more pleasure.

Elsa pulled Anna closer before raking her nails down Anna's freckled back over and over, leaving red lines. Elsa recalled Anna being in control the first time they had sex in Anna's room. Anna was definitely a dominant, but there was no way in hell Elsa was going to cum underneath her little sister. Not this time. This emboldened Elsa and surprised Anna as she flipped their positions.

Elsa took the position of power on top of Anna. With her hands, she kept her pinned down as she rode her little sister with such vigorous passion that Anna was in awe of the beautiful goddess. Elsa didn't want to slow down. She wanted to go faster. All to give Anna the greatest time of her life.

Anna reached up and seized Elsa succulent D-cup breast, squeezing them tightly and making Elsa groan above her. Elsa began to bounce up and down, allowing Anna's dick to sink deep into her. During which, Anna raised her hips as Elsa came down. Anna loved Elsa and wanted her to cum first, so she reached for Elsa's clit and played with it.

Elsa's eyes widened, "I'm gonna-"

Anna felt her build up as well, "Me too, Elsa! Together!" Elsa nodded and both worked faster to make the other explode. Anna learned that although she was well endowed, she couldn't get a girl pregnant. At first, Anna was depressed since who would even want her in that way and even if she did manage to find someone, she would never be able to give her a child. However, now, Anna saw that as a blessing in disguised and didn't hold back as she pounded harder up into Elsa, aiming for that special spot deep in Elsa. Her aim was true, managing to hit it each time due to the screams of Elsa. Together, they both came. Elsa was completely filled with Anna's cum. Their cum mixed as it leaked out on top of Anna. Elsa collapsed on top of Anna who held her in her arms as the hot shower water soothed their sore, tired bodies and washed away their essence.

Both smiled at the other as they cuddled against each other. Now that Elsa wasn't hindered by pleasure, she asked the question that she feared receiving an answer. Anna seemed more experience. A logical explanation came to her and it made Elsa's heart ache, thinking another and laid with Anna before her. "Anna, where did you…learn to do all those amazing things?"

"Um," Anna began, hesitant to answer.

"Have you had sex with another before me?" Elsa asked and Anna could hear the fear and pain in her voice. She instantly sat up and held Elsa's face in her hands.

"No! I swear, Elsa! You are my first! I just- I may have done…research," Anna was now looking away with a red face.

Elsa instantly knew where Anna found that research and smiled with relief before caressing Anna's face and looking into her teal eyes. "Porn?"

"Porn," Anna nodded and smiled sheepishly.

"Of course you did," Elsa fell against Anna and just began laughing. Anna began to laugh too.

(A/N: I've had more time to think about the direction of this story and decided to go a different route. I still would like to aim for at least 7 chapters, but due to this new direction, I will need to re-setup the rest of the story. Thanks to everyone who has shown their support. If there is something you are looking forward to in this story, please share in your reviews. I'd love to hear your ideas. Until next time.)