Secret threesome

Jason was a 15 year old jock who had just completed his freshman year at South Bends High School. Ever since he could remember, girls were crazy about him. His hair, his build… and the rumor about his 9.5 inch cock didn’t hurt his popularity either. Jason never wasted an opportunity to take advantage of a horny admirer and between classes, he could usually be found getting in a few passionate kisses with the cheerleaders.
But school was out now. It was summer, and he had the house to himself while his parents were at work and his sister was away at camp. Already having watched his parents’ “hidden” stash of porn videos, Jason was having trouble finding ways to satisfy his desires. But one night at dinner, his prayers were answered.
“Your Uncle Chuck is going to Miami for the next couple of weeks for an NADA meeting,” Jason’s father informed him. However, Jason failed to see how this concerned him, and resumed eating. “He asked me if I would allow Jessie to stay here while he’s gone. Since y-.”
Jason’s enthusiasm caused him to start choking on his brocolli. Jessie was his uncle’s 13 year old daughter and Jason had a crush on her ever since he disregarded the belief in cooties.
“You told him yes right?”
“I told him I’d run it by you first. After all, she would be here with you all day.”
“You didn’t need to ask. You know I’d say yes.”
Jason was horny already. No one knew about his crush on his cousin (having a crush on you cousin isn’t exactly something you brag about) not even Jessie. But now seemed a good time to make a move.