He is hesitant, she is not

"Well, I don't know" he whines.

"Well I do!" Beth says excitedly. First she pulls up her skirt, exposing her bare pantiless pussy. She grabs his hand off his dick, and grabs his other hand, and pushes him down the chair. His hard dick points up, and she lowers her self over it, moving around a little, trying to position it under her pussy. Finally she feels his little cock-head rubbing against the outside of her pussy, and she sits down as hard as she can, plunging herself on his cock. He's not nearly big enough to fill her up, but she knows pussy-squeezing tricks that make it feel nice and tight for him.

"I really don't know about this" the nerd says, trying to keep his cool as his fantasies are coming true. "I just don't know."

Still holding his hand away from his body, and bouncing herself on his lap with her powerful legs, Beth leans forward and shuts him up by pushing her tits in his face. Her two monster melons push against and on the side of his face, bouncing and slapping it with every pubic thrust that Beth makes.

In less than a minute nerd-boy blows his load into Beth, and she feels his dick go limp, and pop out of her as she bounces. She lets go of his hands and pushes her tits hard into his face, then lets go and stands up. She feels the nerd-boy's runny semen trickling down her leg. He is still just sitting on the chair, in shock, his lap covered in leaked pussy juice.