Elsa was trying to enjoy her holidays, especially because she knew that they would be short this year. She only had two weeks before she would start working. She would have a job for the first time in her life, and she wasn't really thrilled about it. However, she knew she would appreciate the extra money over the next year. And it would prevent her from spending all her time with her sister. Especially now that Anna was on holidays too and had convinced their father to set up the swimming pool again.

Swimming pool meant swimming and sunbathing, which meant long days of torture for Elsa as she watched her sister move around in a swimsuit. They were currently installing the pool and Elsa knew that she would appreciate the cool water to fight off the heavy sun. It was getting really hot and everything predicted a dry and scorching summer.

Elsa didn't know how Anna had managed it, but her sister had also convinced their parents to let her stay at home with her while they were going abroad. They had clearly been against it at first, so Elsa wondered how Anna had managed to change their minds. But nothing really surprised her anymore with Anna. She could sell sand in the desert. It meant that they were going to spend two weeks alone in the house, one of which she wouldn't be working.

They finished setting up the big above ground pool and filled it with water.

Two days later, the water had gotten warmer and Anna burst into her room in a green swimsuit. The blonde was surfing on the web to pass the time but she looked at her sister and struggled not to ogle her. Anna was wearing a decent, but small bikini that still revealed way too much skin for Elsa's sanity. And she had to admit that Anna's thigh gap was incredibly sexy, even if she wasn't really into the craze and thought that the girls who starved to death to get it were pretty dumb.

"Come on sis, let's go swimming. We're suffocating in here." whined Anna.

"Yeah... yeah, let me change and I'll join you there."

The redhead smiled and left the room, not aware of her sister's eyes locked on her rear. The real struggle begins.

Elsa locked the door and changed into her own white swimsuit. Then, she went to the bathroom and looked at herself in the mirror. Maybe I should buy a new one. My butt has filled out since last year. She grabbed some sunscreen and applied it, careful not to miss any spots. She wondered if Anna had thought about that and took the lotion downstairs with her.

Anna was waiting for her near the pool. She had prepared two deck chairs on the side and two towels. The redhead went to the ladder when she saw Elsa and jumped into the pool.

"Shit it's cold!"

Elsa laughed and joined her more carefully. The water was indeed cold, but it was a welcome sensation. They quietly floated in the water for a few minutes until Anna came from behind Elsa and applied all her strength on her sister's shoulders to sink her. The blonde was caught by surprise and ended up under the water. Humpf. Didn't want to get my hair wet. Elsa got her head out of the water and spent the next ten minutes getting her revenge on her poor sister, who kept laughing and screaming.

Once they were too tired to continue, Elsa got out and loosened her hair before letting herself dry on the desk chair, closing her eyes and enjoying the warm sun on her body.

"Why do you always wear your hair in braids? It looks awesome when it's loose." asked Anna.

"I don't know. Just a habit, I guess."

She opened her eyes and noticed that her sister was laying on her stomach in the other chair, head on her crossed arms. "Did you remember to put on sunscreen?"

"Nope."

"You're going to get sunburned. You know you get them easily."

"It's not that sunny."

"Anna..."

"Too tired." She closed her eyes and feigned sleeping. "You can do it though, if you really care about me."

"Come on Anna, don't act like a little kid. You're going to regret it once you look like a cooked lobster. And it's gonna hurt like hell."

"Yeah, just because my big sister wouldn't help me." Anna pouted at her with wide watery eyes. You should become an actress, not a designer. "Please, I'm such in a comfortable position there. I'm not going to get up."

Elsa sighed and got up to grab the sunscreen. Then she put some on Anna's back and rubbed it in. She tried to think about anything but her sister's skin under her hands. Everything was fine when she was rubbing Anna's shoulders, but things got worse as she lowered her hands, skimming over the strap of her sister's bikini top and finally reaching her lower back. She tried to do it as professionally as she could, as if she didn't like what she was doing, but the small sighs of pleasure coming from her sister didn't help and she couldn't stop herself from focusing a little too much on her sister's back dimples with her thumbs.

I have to get back into the cold water or I'm gonna cook from the inside.

"I... I took care of your back. You can deal with your legs yourself."

"Thanks. But I'm feeling too good right now, especially after that little massage of yours. I think I'm going to fall asleep." Elsa thought Anna was playing some tricks again, but she saw her sister yawn and she wasn't so sure anymore.

You shouldn't have even done her back in the first place. She's got way too much power over you. But could she really let her sister nap under the heavy sun without protection? Anna's legs would hurt like hell. Elsa shook her head and started rubbing lotion on Anna's legs too, repeating in her mind that she shouldn't do it, but being completely powerless to stop herself.

Anna let a small moan out as Elsa rubbed her calf and it made Elsa stop. "Don't stop" Anna mumbled in a sleepy voice "you could make a great masseuse, sis." The blonde hurried to finish and jumped into the pool to cool off. She counted the days as she stayed underwater. Eleven days until she went to work. Eleven days of exquisite torture.

Anna was quite happy with her holidays. They were starting off really good, especially since they could use the pool. It's really a shame that Elsa has to go to work in a few days. Maybe she could invite some of her friends. They weren't mad at her anymore and she most likely wasn't going to see them much next year. She hoped that she would make good friends in her new high school. Moving out to a new place where she wouldn't know anybody worried her a little. A shout from her father interrupted her train of thoughts.

"We're leaving, girls!" Finally! "Come and say goodbye."

She hurried downstairs and Elsa followed her. Their parents had decided to leave early in the morning so that they could arrive at their destination before nightfall.

"Don't forget to eat" their mom started, "to lock the door, to drink enough and to call us every day."

"And you can invite friends, but don't organize any parties. And no alcohol." their dad continued

"Yes, dad, we know, don't worry. We'll be living on our own soon."

"Ok, ok. Enjoy your holidays, and good luck with your job Elsa."

They hugged and their father added "And take care of your sister" while he was hugging Elsa. Although, he was looking directly at Anna and she nodded, knowing what he actually meant.

Their parents finally left and Anna felt free. They weren't used to being alone in the house, and now they had two weeks of freedom ahead of them.

Elsa was reading on a recliner when she got a text from Olaf.

2:40 It works for me. See you tomorrow!

She read it and replied.

2:42 Good! Flynn and Rapz will be there too. Don't forget your swimsuit!

Her parents had left this morning and she had invited her friends to a pool party tomorrow. It would take her mind off her sister, who was lying on the recliner next to her right now, and from other thoughts as well.

She went back to her book until she heard Anna's sleepy voice.

"My back is burning. Could you put some more sunblock on it please?"

Elsa had done this a few times in the last few days and was slowly getting used to it. She sighed to show that she wasn't happy with this arrangement, but grabbed the lotion anyway and started applying it onto her sister's shoulder-blades. Except, this time Anna's hand also went to her own back and started pulling on the strings of her bikini top.

"What... what are you doing?" stammered Elsa.

"I don't want to get any tan lines." Said Anna as she finished taking off her top and put it aside on the ground.

"But... what if someone sees you?"

"Who would see me? We're all alone."

"I... I don't know. What if someone arrives?"

"Unless they parachute into our garden, I think they'll ring the doorbell first."

Elsa tried to reason with herself. Anna was actually not showing anything more than before. There was no harm done. It was just a strap off. She managed to convince herself that nothing had changed and went back to her book. Until she heard some movement and turned her head to see her sister turning to lie on the back. And the only thing Anna had on her upper-body was the locket Elsa had given her, resting in the valley between her two naked breasts, small pink nipples pointed proudly toward the sky.

"Sis, you're staring."

How much time had passed? She had to find an excuse.

"What? No." Fuck. "I'm thinking."

"Mhmm." She saw that Anna was blushing despite her assured voice. Of course she's blushing, you're staring at her bare chest!

"You should take off the necklace if you don't want tan marks" Fuck, couldn't you tell her to put her bikini top back instead?

"Hmpf. I don't want to take it off."

Elsa closed her eyes to stop staring, but all she could see was her sister's lightly freckled chest and pink nipples. Why did she do that? Is that a normal thing to do? Does she really care about tan lines? Is she just messing with me? Has she got an exhibitionist fetish or something? Does she just want to be comfortable? Do I see evil everywhere because I'm corrupted myself? Are sisters normally embarrassed to see each other naked? Or should it be ok like when you're just kids, because no one should feel aroused?

She would love to ask someone about this, but the only person she could speak to about her problems didn't have a sister. She grabbed her phone and texted her best friend anyway.

3:30 Is it ok to sunbathe topless?

The reply came quickly.

3:32 lol! Is it about tomorrow? Is it a nudist party you're organizing? How surprising of you.

Couldn't Rapunzel be serious from time to time? She was writing a reply when she got another one.

3:34 But I guess it's ok. Plenty of women do it on the beach. You just have to feel confident.

She sighed. Yeah, it was nothing extraordinary. Plenty of women did it. With many people they didn't know around them. Anna had done it in front of only one person. Someone she trusted.

3:36 Is there a topless princess near you?

Of course she would guess eventually.

3:37 Yeah. I won't survive this summer.

3:38 Poor you. The girl you love and who asked you to feel her up is almost naked next to you. I feel so sorry for you :'(

Elsa groaned at Rapunzel's biting sarcasm and shut her phone off.

"Put on some sunscreen." Elsa told her sister while she avoided looking at her.

"Do you wa... ?" Elsa cut her off before she could finish. "And do it yourself."

Anna chuckled. "I was just joking."

Elsa put her sunglasses on to hide her eyes and shamefully turned a little to make sure her sister was protecting herself from the sun. Yeah, keep telling yourself that excuse, eventually, you may start believing it.

"I invited my friends over tomorrow."

"Oh, good. The whole day?"

"In the afternoon. And for the night, if it's ok with you?"

"Sure!"

The next day, they cooked together for lunch and Elsa was glad that her sister was wearing a green pareo over her swimsuit. It was sexy and it caught her eyes multiple times, but at least Anna was covered a little. It was nice cooking with Anna and it reminded her of her first date with her ex-girlfriend. She had been nervous at the time, but she was sure she hadn't been as troubled by her cooking partner as she was now.

They had called their parents this morning to tell them that everything was ok, and her friends were supposed to arrive in an hour or two. It felt strange to be alone here with Anna, but she liked it. And she knew it was mutual because Anna had been beaming with joy ever since their parents had left.

They ate together and prepared the house while waiting for her friends. Elsa brought out a laptop and two speakers and placed them near the pool, while Anna brought out three other recliners and towels. Olaf arrived first with a pack of beers, that she wouldn't touch at all, and a beach ball. He said hi to them, took off his shirt and immediately jumped into the pool.

"You're so lucky you have a pool. I've been dying because of the heat."

He got out of the pool, water dripping off his muscular chest and Elsa noticed that he was a handsome man after all, even is she was definitely not interested. Still she couldn't help glancing at Anna to see if she was eyeing him. She was glad to see that Anna was actually looking at her.

Flynn and his girlfriend arrived soon after, with meat for the barbecue they had planned for dinner. They spent the entire afternoon, in or near the pool, playing and laughing together. Olaf had just gotten out of the pool to grab a beer when Rapunzel asked for a chicken fight and climbed on her boyfriend's shoulder.

"Come on Anna, climb on your sister. I'm sure I can take you down."

"Game on!" shouted Anna.

Before Elsa could complain, the redhead hopped on her shoulders and tightened her thighs around her neck. The older sister circled her arms around her sister's legs to hold her tight and tried not to focus on the wet fabric against her neck.

Once they were all ready, Flynn launched himself at her, but she quickly sidestepped to the right and Anna pushed hard on Rapunzel's back, who fell into the water.

Anna giggled. "Fastest chicken fight ever." She bent and kissed her sister on top of her head. "Did you forget that sis took some boxing classes?"

Flynn grunted and Elsa laughed.

"Come on Rapz get back on him!" said Anna who was clearly enjoying herself. And, as Elsa's competitive nature took over her, she added "And try to last longer than two seconds!"

Rapunzel did, and the second fight was longer. Anna was obviously weaker than her opponent but Elsa did all she could to assist her and throw her opponent off-balance. They won again, and again, finding some understanding between them as the time passed. Anna progressively learned how to compensate her lack of strength with speed, and they worked together as one.

Rapunzel finally conceded. "Seems we can't win."

Flynn nodded, out of breath.

"Come in here Olaf and help me get Anna down!"

Olaf agreed and took Flynn's place, who happily left his position to grab a beer instead.

Elsa tightened her grip on her sister's thighs, foreshadowing that it would be harder to win against their new opponent. The fight was definitely harder, but the two sisters won nonetheless when Elsa successfully made Olaf lose his balance. Anna kissed her again and Elsa couldn't help but brag about their victory. "Sorry Rapz, you won't win today!"

Flynn took his girlfriend's place on his friend's shoulder and Anna chuckled. "You really want to see us lose, huh?"

They won the first game, but Anna finally hit the water in the next one. Elsa was exhausted and crashed onto her towel, panting. She was soon joined by Anna who lay next to her and took her hand in hers. "Took them long enough to defeat us."

"Yeah." She looked at her friends and added with a smile. "We had to lose on purpose or they would have never stopped."

They spent the rest of the afternoon on the towels and then wolfed down the meat and sausages Flynn was grilling on the barbecue. They played board and card games until much later and they found themselves still outside after midnight. The temperature had lowered a bit, but they were far from cold in the warm summer night. They couldn't see anything anymore though, even with the light she had turned on in the living room.

"I'll have to bring a lamp out here if we want to continue."

"I've got a better idea!" said Rapunzel suddenly as if she had just gotten the idea of the century.

"Hmm?"

"We should go skinny dipping!"

"What?!" there was no way Elsa was going to do that.

"Come on, it's something we have to do at least once in our life! It's dark, and it's still hot, so it will be nice to get into the water."

"Don't need to be nude to do that."

"I'm in!" said Flynn, and Olaf nodded too. "Yeah, come on, that's what teenagers do at pool parties."

Anna was blushing, but she shrugged. "Why not, sis?"

"No." Her voice was way colder than she had meant at first and the others looked at them with surprise. "You're not doing it Anna." She would die before letting Anna go nude in front of her friends, even if they couldn't see a damn thing in the dark.

"Come on, it's not that bad."

"Don't argue, Anna, I'm not going to be swayed on this."

"You're not my mother, Elsa! And I'm sixteen. I can do what I want!"

Fuck, why does she have to take it that way? I'm perfectly aware I'm not your mother, Anna.

She breathed in and out slowly, trying to calm herself.

"Can you follow me inside please?" she didn't want to have this conversation in front of her friends. She went in and Anna followed. She closed the door behind them.

"Please, Anna, I'm begging you, don't do this."

"What? Why...?" She looked surprised by the tone of Elsa's voice.

"I... I know I'm not your mother. And I don't want to ruin your fun. It's just...I... I can't stand it. Please don't. Can you do this for me?" begged Elsa.

"Of course sis. You just had to ask." Anna smiled and hugged her. "I would never do something that makes you unhappy."

"Thanks." She rubbed Anna's back and sighed, relieved. They stayed in that position for some time until she kissed her sister on the head and then said. "Come on let's go back outside."

She opened the door and got out, half-expecting to see her friends naked in the pool, but they were up and packing.

Rapunzel spoke first. "It's actually getting pretty late. We're going to go home. Thank you so much for inviting us, it was a wonderful day!" The two young men nodded in agreement.

"You can sleep here if you want. We've got plenty of room." offered Elsa

They looked at each other, not sure of what to say. They must think that I argued with Anna.

"I'll sleep with Anna, so one of our rooms is free."

"Oh, ok. Are you sure you don't mind?"

Anna answered. "Of course not. You can stay here."

So, Elsa's friends agreed to sleep at their place. Elsa took a shower and went to her bed, with Anna soon joining her, smelling of shampoo. She was half-asleep already when Anna asked her "Was it because you were jealous?"

The blonde grunted, but said yes, to which Anna giggled. The redhead settled herself into her arms and Elsa complained. "It's too hot to cuddle, Anna."

"You shouldn't have given my room to your friends then." The redhead went to open the window, and then went back to her initial position. Elsa didn't complain again. She knew better anyway.