You're Stiff

Bonnie is sorting through her books and seeing which ones she needs to return to her library, as she does you notice you can see straight down her very revealing top. As she leans over more and more you get a better look at her tits and one of her nipples pops out, your cock gets instantly erect and when Bonnie looks up she realises what you have been upto. Luckily for you though she needs a ride to the library and she knows just how to repay you for helping her out.