She does!

"Okay," she says, grinning down at you, "But if you cum first.. then after I'm done with you.. and after Miss Parkers had her way with you... and after your biiig night with Rose... You come back to see me. Okay?"

You gulp at the exhausting prospects that lie ahead if you can't hold back here. But you're not going to cum first, are you? After all you've been through, this little nerds not going to be enough to tip you over.

"Okay," you reply, and she grins and claps her hands.

Pulling your pants down, she lifts her dress up and mounts you, your hard, sore cock sliding sweetly into her already dripping pussy. The little nerd rides you fast and hard on the desk as you fondle her breasts through her sensible dress, her groans and gasps very loud in the silence of the library. She's tight, and knows how to ride, and excited as she is, you're soon having to bite your lip to hold back yourself. The pill Rose gave you seems to be making you hornier and hornier the more girls you screw.. was it a trick all along? The girl shift her weight and begins to grind rhythmically down against you and oh shit, she can't be far off cumming now, but are you even closer?