"...that when Jon enters this room, he will take one glance at my legs, grow the hardest erection he's ever had in his life, run right past me, climb into his bed, pull the covers over his body, and masturbate!"
Sarah giggled to herself at the thought of Jon embarrassing himself right in front of her. This was going to be fun!
Jon pounded up the steps mumbling to himself. "I'm not going to be Sarah's personal waiter anymore! If this isn't good enough, then she can drink her own spit for all I care!"
Jon pushed the door open and handed Sarah the glass. She flashed him a mischievous smile and whispered into his ear. "Thanks Jon! You're such a gentleman! I admire that!"
As she reached for the glass, Jon noticed that Sarah had hiked her dress up quite a bit. He found himself gazing at her long, slender legs folded beneath her. They were perfect. Smooth and tan.
Suddenly Jon felt his member grow painfully stiff. He clenched his jaw and panic flowed through him. His eyes began to water and he found his mind submitting to an overload of chemical lust. "Oh! What is happening!"
Jon ran to his bed and hid under the sheets. He reached into his pants and began pounding away. Sarah stood up.
"Jon!! What are you doing?!"
In between grunts, Jon managed to speak. "I.. ugh... don't know! Sarah, please... ugh... forgive me! Something's wrong."
As Jon continued to build towards a climax, he saw Sarah unfold her hands in his peripheral vision.
"Hey Jon... nothing is wrong as far as I'm concerned! Ha, ha, ha!"
"Sarah! Ugh... what... ugh... did you do?"
"Oh, it's about to get a lot better you horny pervert! I wish..."