Despite the bet, you're still a couple. Get her off!

You hold back the best you can, raising your hips slowly to meet Jessica's slowing thrusts. She smiles as you begin thrusting more quickly, and despite her apparent exhaustion, begins quickening her tempo to match yours.

"Ohhhmmmmnnn." Her groans are beginning to grow as you two begin making more noise. Thankfully, your house is fairly secluded, so you never worry about waking neighbors. Your own groans add to Jessica's as your wet, noisy thrusts begin to grow more urgent. Jess whimpers as she leans over you, rubbing her rock hard nipples into your chest.

"I'm going to cum," she whispers, reaching down to play with your balls. "How are you holding up?" You nod, trying not to blow your load until Jessica's ready. "Good."

She begins jumping up and down on your dick with vigor, something she's never done before. Her aggression amazes you as she begins to scream, her orgasm taking over her body. You watch as her entire body trembles and she collapses on top of you, her hands tickling your balls as you empty your load into her pussy. You smile at her as she rolls off of you with a plop, looking at your softening dick with a contented smile.