A/N - This an AU of the Stefan/Bonnie scene from 4x02.
Stefan's head thrashes back and forth in bliss as Bonnie moves up and down on his cock. Her hands rest on his hard torso to give her leverage and his hands are wrapped around her hips. He can feel every bump each time he thrusts back inside of her.
It's funny; he initially came to see Bonnie because he needed magical help, but found that Bonnie needed comfort instead. He wrapped his arms around her intending to give her a comforting hug, but once she was there, he found that he didn't want her to leave. He found himself intoxicated by the smell of her hair, the softness of her skin, and the warmth of her breath against his chest.
He pulled away from her slightly, placing a hand under her chin and lifted her head slightly so he could look right at her. It was when he moved to wipe away the left over tears on her face that he got a look at her eyes. He became enchanted by the how green and expressive they were and found that he suddenly couldn't resist the urge to kiss her. He gave into that urge and now here they were on her couch having sex.
Bonnie's walls clench around his cock and he can feel her fluids leak onto him. He sits up so he can kiss her and press her body to his. His tongue licks at the seam of her lips until she opens it quickly and happily slipping his tongue in. He loves the way her breasts feel pressed against his own chest and the way her hands feel on his back.
He doesn't think about the fact that he's basically cheating on Elena with her best friend. It doesn't cross his mind that the problem he needed Bonnie's help with is still there. The only thought in his mind at the moment is the fact that he's inside of Bonnie and it feels fucking fantastic.
Her legs wrap tighter around his waist and her bouncing and his thrusts both become more frenzied. If possible Bonnie's walls become even tighter and Stefan knows she is just about ready to climax. A few moments later she does just that. She pulls away from the hot kisses they have been exchanging and comes with loud moan.
Stefan looks at Bonnie; her eyes closed in ecstasy, her nipples perky with lust, and her mouth pink from kisses and he begins thrusting hurriedly into her; his need to release becoming more necessary. He thrusts four more times until he finally climaxes, his come filing up her womb. Stefan moves his mouth to her shoulder and places a kiss there, neither saying a word for several minutes.
Stefan looks at Bonnie and by the horrified look on her face; he can tell she is already thinking about Elena. His mind also goes there briefly and while he feels some guilt, he cannot bring himself to regret what happened. She moves to get up, but he grips her hips keeping her there. His softened cock begins to harden slightly and he moves around a bit inside of her.
Bonnie gives him a questioning look and says "This was mistake. I was upset, you ended up trying to comfort me and we got carried away. We can't do this …"
Stefan interrupts her by shaking his head before declaring. "I'm breaking up with her." He came to resolution mid climax that this with Bonnie could never just be one time thing. "I know you're vulnerable right now, but I really think we could be good together."
"Stefan a few hours ago you were in a committed relationship with Elena and now you say you want be with me? Why the sudden change?" Bonnie looks up at him suspiciously.
Despite the situation, his hands begin stroking her hips and he has to hide the happy smirk that appears when it becomes obvious Bonnie is being affected by his ministrations. She looks a way and Stefan takes one hand and turns her back toward him.
"Come on Bonnie." He begins softly, "You know this was a long time coming. I know you remember what almost happened between us in the tomb." He looks at her and she reluctantly nods her head in agreement.
It happened back when they were working in the tombs to figure out how to kill Klaus. He got angry with her because she was unable to get her magic to work. He blurted out that he couldn't live this way anymore and that resulted in them coming together in an unexpected kiss. They almost made love right in tomb until they were interrupted. After that, they both acted as if it never happened and never spoke about it again. Stefan had been dealing with coming back from ripper Stefan and Bonnie was still upset about Abby, so it was fairly easy not to go there.
He can't deny that he's been thinking about her for a while now, but he always figured it was because she was gorgeous and now he knew just how great a kisser she was.
It wasn't until today that he realized that he's been in denial and that his feelings for Bonnie had changed. He realized that he has been clinging to his relationship with Elena despite the fact that his feelings have changed because it was easier to go with the known and then the unknown. There is no way he would have made love to Bonnie without there already being something there and now that he's had her he doesn't want to give it up.
"You're right." Bonnie stares at him deeply, "What are we going to do"
"Well first I'm going to take you upstairs so I can make love to you a few more times." he says sexily before sobering up, "then I'm going to break up with Elena and I hope that you and I could try our hands at a relationship. So what do you say? Are you in?" He looks at her pleading for her to agree.
Bonnie looks at him and says "Okay, but it's a given that no one really be happy for us."
Stefan agrees, "That's true, but as long we have each other I think we'll be fine." He leans intending for it only be a quick peck, but it grows into a hot and frantic kiss. This causes him to harden completely and Bonnie's walls to clench. With that Stefan stands up, still inside of Bonnie and carries her up the stairs.