She's gone soft, but she can still put the steel back in you

You roll off the tall, super-busty dream girl and try to catch your breath. She lays there beside you, all signs of struggle gone.

"Hey Wendy, what did you mean when you said, 'Another one could finish me'?"

Wendy rolls over and looks at you adoringly. "You've discovered my final secret. Every time I orgasm, it breaks my resistance further. With that last, wonderful orgasm, as I lost my virginity, I lost all urge to resist. I'm yours."

"Mine?"

"Yes." She rolls over and starts kissing your chest gently. Her large breasts drag against your stomach. In between kisses, she continues. "I'll regain my powers within hours, but even after that, I still won't resist you. I need you. I need to feel you cock inside me, I need to taste your cum. I need your hands on my breasts and all over my body! Please say you'll keep fucking me, please!?"

Wendy's hand slides down to your cock, which responds instantly. You should be able to satisfy her request very soon.