Vagina!

You lay Helene down on the mat, on her back, with her arms still immobilized by her top. You start with her tits, teasing her nipples, taking one and then the other into your mouth. Her legs are twitching and your hand wanders between her legs, rubbing her pussy through her bottoms, then easing them down and off her. Next you slide a finger into her: She's dripping wet. You slide down, gently pushing her thighs apart. She shifts under you, lining up so you can push into her. As you slide home she lets out a long, low groan. You give it to her gently at first, but after a few slow strokes, you find your rhythm and begin slamming your thrusts hard and fast. You don't last too long, and soon you're coming inside of her, finishing with a few shuddering strokes.

For a second you both just lay there. Helene smiles up at you and you gently pull out, stopping to wipe your dick on her bottoms. You can hardly believe it, but you've won - and what a debut!