Author Note: This story really isn't meant for kids. It's is the heated part of Frankie Stein's and Jackson Jekyll/Holt Hyde relationship. There have been a handful of love fanfics between this couple, but I want to make what would happen if they have sex for the first time. I also made a little philosophy of how Jackson and Holt's transformation works.

Disclaimer: I don't own Monster High, just the story.

Jackson and I sit in my room, by my desk, working on homework. We talk and joke, glance at one another and giggled.

While writing for dead languages class, a question comes up in my mind. A question I've been thinking for a few weeks. "Jackson, can we take a break? I need to ask you something." I ask my boyfriend, bitting my lip.

Jackson looks up to me from his Mad science work, smiling. "Of course Frankie." Jackson sets his work to the side and turns back to me with his beautiful blue eyes. "What do you want to tell me?" He asks sweetly.

I take a deep breath and fix my eyes on him. "I've been thinking, we've been together for a while now." I stop and take another deep breath, clenching my fists. "This is a really serious question I'm going to ask you." I finish and Jackson gives me a nod. My heart starts racing. "How do you feel about taking our relationship further?" I look down to the floor. The room becomes silent for a minute. I close my eyes, feeling like a dirty undead being.

"Do you mean having sex?" I hear Jackson ask.

"Yes." The silence comes again, I feel my fingers lifting my chin to look at a warm, loving smile.

"Are you sure?"

"I've been thinking about this for a while, about three weeks now." I reply quietly. Jackson's smile just grows sweetly. "I thought you would be stunned by this question." I ask in confusion.

"No. Me and Holt have been thinking and talking about this almost about a month. I just never told you because I thought you weren't ready for sex." Jackson answers without any sign of weakness, catching me off guard.

I blow a sigh of relief "Now that's out of the way, I want to tell you my concerns." Jackson smiles in response. "I'm more concern with having sex with Holt than you." I have a twinge of guilt and scrunch my face, closing my eyes. I know and believe Holt and Jackson are the same person with different personalities. But when it comes to thinking about sex, I want to have it with Jackson first, which might hurt Holt. "I know this is awkward to talk about, especially with Holt in the mix. But he's your other half and I love you two both."

"I know, I know. And you're right about me and Holt. You don't need to worry about us." Jackson says sweetly.

I blow a sigh of relief of Jackson's understanding nature. "While thinking about this. I thought of a plan." I giggle. "My parents are taking a trip with your parents two weeks from now and last for the same amount of time. I imagine having sex with you first and Holt the week after." I play with my fingers, blushing. "I'm acting like an idiot, aren't I?"

"No, no Frankie. It's ok. I'm glad were talking about this because I want to know you're comfortable." Jackson says gently.

"What about you? How do you feel about this?" I ask shyly.

"When I thought about it, it was hard. Both me and Holt wanted to have sex with you first. After talking about it for a long time, Holt and I agree with your idea." Jackson answers, scratching the back of his head, giving off a goofy smile, which I return.

The room falls silent again for a few minutes. "So... Do you want to have sex when your parents are gone in two weeks?" Jackson asks with a calm voice.

I stare at him with wide eyes, shocked from Jackson's calm demeanor with the topic of sex. Holt would be willing to talk about sex more than Jackson. Jackson is more shy, but Holt would be more cocky about sex and not take it seriously. "Yes..." I answer, blushing and bitting my lip. "But how does Holt feel about this?"

Jackson bends down to grab his headphones from his bag and turns back to me. "How about you find out." Jackson smiles to me with his gentle voice. He places his I-coffin next to me, the play button full in view of the screen, giving me the choice to talk with Holt.

I press the screen and look up to my boyfriend, who has his headphones on his head.

"Talk to you soon." He smiles before a blue skin, fire hair D.J replaced Jackson's spot. My body tenses up from Holt's presence. There is no shouting or screaming, just a sweet, gentle smile. "Hi Frankie-fine." Holt says softly.

"Hi Holt." I respond in the same way. "How much did you hear?"

"A lot actually."

I duck my head to his gaze. I felt my cheeks become warm as Holt's hand covers my hand, his thumb rubbing the skin. His other hand cups my chin and lifts my head to look at him.

"Frankie-Fine. Are you sure you want this?"

Holt's calm demeanor melts my heart. I smile. "Yes, yes. I'm really sure." I say quietly but with confidence. Holt just smiles sweetly, taking me off guard once again. "Aren't you offended by what I said?" I ask in confusion.

"No. To be honest, I am a little hurt by what you said. But I want to make you feel comfortable." I wince from his sentence, but smile. He cups my cheeks and draws my face closer to his. "Frankie, I love you. I love you with all my heart. There is no one like you who loves me of both sides. I don't want to lose that. You are my yang and Jackson's yin. I respect your needs and wants and I want our relationship to work. I'll put in all my energy to make this work. " Holt speaks in such a soft and kind voice.

"Thank you." I reply, almost feeling like crying.

He pulls his lips up to mine, I close my eyes and lean forward to hit his soft lips. Holt wasn't playing around, the kiss feels more serious and becomes deeper in a second, making me melt in my seat. I wrap my arms around Holt's neck, he wraps his around my waist, pulling me up and closer, pressing me to his warm body. His kiss feels hot and heavy. Holt bits a little on my lower lip, making me moan and open my mouth, letting Holt's tongue in. I feel Holt's hands ghost over my lower thighs. He grabs my legs and lifts me up to set me down on the table. Our kiss feels rough and passionate. I know Holt is teasing me as I feel his hands rub my thigh. He breaks the kiss and pulls back with a smirk on his lips.

"How about me have sex right here, right now."

"Ah, ah, ah, wait your turn." I smirk at him. "Leave the foreplay until three weeks."

"Awww man. You know Holt Hyde doesn't like to wait baby." He shouts. "But I'm make an exception for my number one ghoul's wishes."

I giggle and throw my arms around Holt's neck and my head on his shoulder. He wraps his hands around my back and lifts me off the table, suspending me in mid air for a couple of seconds before steading me down to the ground. I release my grip on his shoulder to look at the smiling amber eyes.

I give him a peck on the cheek. "Come on, we better get back to work." I say with a smirk.

"Alright!" Holt cheers.

We walk back to our seats. Holt grabs his phone with one hand and the other for his headphones. I grab his wrist with his phone and pull it towards me, making him stare at me with confusion.

"Please don't tell me you're using Jackson as a way to get out of homework again." I sternly say.

"Why? Do you want me to stay here and study with you for a while Frankie-fine?" He says sarcastically with a smirk.

"No, I just want you to work on your homework." I reply.

Holt smiles, grabs my waist with his other hand, gives me a light peck before looking serious at me. "I'm not skipping homework baby. It's just Jackson want to talk to you."

I roll my eyes. "Alright, but I want you to work on your homework next time."

"Promise. As long as Jackson steps into my activities." Holt chuckles and I roll my eyes again as I release his hand. He taps his I-coffin before looking me in the eye. "See you tomorrow baby," before Jackson takes his place. I sit down in my seat while staring at my boyfriend. Jackson takes his headphones off and adjust his glasses.

"You ready to get back to work?" I ask quickly to avoid the topic of sex.

"Yes." He answers and we turn back to our homework and start again.

"I told Holt to do more homework for you."

"Frankie, you know I'm fine with doing our homework. We're the same person." Jackson replies with a chuckle.

"Ok. I just don't want Holt to become a delinquent." I turn to look at the normie beside me. I see him crack a smile and let out a bolt of laughter.

"What's so funny?" I ask, raising an eyebrow.

"I'm sorry... I'm sorry Frankie... It's just... Your kinda of right. But me and Holt have the same mind. He won't become a delinquent for as long as I live." Jackson laughs between breaths.

"I lean more about you everyday. I'm sorry if I offended you." I lower my head on shame.

"No, no. It's ok Frankie. You want Holt to do our homework and let me rest. But it's ok. There's no shame in asking me questions." Jackson says softly and places his hand in mine, rubbing it with his thumb. I look up to see my boyfriend's smiling eyes. "Hey, it's ok. I'm glad you're looking out for me."

I smile from Jackson's soft voice. "How do you and Holt remember when the other is not present?" I asks with curiosity.

"Ummm... Well, I don't really know. It depends on the situation, conservation and physical pain. I passed on your name to Holt's memory because I felt really strong feelings for you. Usually when I or Holt's feelings are really strong, the other remembers what happened." Jackson explains.

I feel more curiosity. "What does happen to you when Holt takes your place?"

"Umm... I call it blackouts because I don't remember. But it's more like falling asleep, expect without dreaming."

"And what about Holt?"

"As far as I know... same thing."

I have one more question. "Ummm... This might sound awkward, but... When you and I have sex, will Holt remember it? Vice versa with me and Holt." I duck and feel my cheeks heat up in embarrassment.

"I'm sure, yes." I hear Jackson answer with a gentle voice .

"I'm sorry for asking you that."

"No, no Frankie. I'm glad you're asking me these questions. This is good for our relationship. Don't ever feel ashamed of asking me questions. Ok?"

Jackson lifts my chin and I nod my head. "Ok." Jackson's eyes seem to sparkle. I feel myself pull forward gently and close my eyes, titling my head. Our lips met and I feel content and warm. I give Jackson my passion and he gives me his. Even though I our bodies are half a foot apart, I could feel his body heat against me.

Jackson breaks the kiss and stares loving in my eyes. "Now, let get back to work." He says and gestures to the deal next to us.

I roll my eyes. "Way to kill the mood." I say sarcastically. Jackson just chuckles and kisses my forehead before drawing away. We turn back to our homework and grab our pencils. "Thank you Jackson." I mumble to him.

During the rest of our study time, we laugh, joke and talk about the homework in front of us. We finish as the clock says 6:00p.m. I walk Jackson out to the front door and he pulls me to a dark corner. We passionately kiss and say our goodbyes. I watch him walk away before walking inside with a dopey smile. I can't wait for two weeks to be up."

Author Note: Thank you for reading! Please review.