A Sister's Sweet Reward

Tim and his hot older sister Samantha both have secrets that would get them in a lot of trouble with their parents. Samantha's secret is she no longer has any interest in boys and has been sleeping with her best friend Kelly for the last few months.
Tim's secret is he has been spying on his sister, watching her play with herself and fantasizing about having sex with her. When Tim skips class and Kelly comes over he sneaks upstairs and watches Samantha and Kelly have sex.
Unfortunately this almost gets Samantha found out when his mother comes home unexpectedly. Tim barges into Samantha's room to get Kelly out of there, but it’s too late when Mom also enters the room.
Thinking quickly, Tim says Kelly was sneaking over to fool around with him and gets grounded for a month. Later that night, Samantha comes in to thank him for keeping her secret safe. She tells Tim she plans on rewarding him for being so sweet to her. Tim says she doesn't have to until Samantha tells him she has another secret.
It seems Samantha still gets the urge for a man from time to time, but not just any man, but her good looking younger brother. Tonight Samantha is going to give Tim the reward of a lifetime! Getting grounded has never been this hot!