You're at your wife's family's house for dinner. Her sister is there and you can't keep your eyes off of the young, busty college student. You've always thought she was hot, but she's your wife's sister so you can't do anything about it. However, during the dinner, she notices that you keep looking at her and invites you up to her room. You enter and she's there looking as seductive as ever. She knows you want her and she's been so horny. She wants your cock just as bad as you want her pussy. A quick little fuck wouldn't hurt right? Your wife doesn't have to know. It will be your little secret.