You are with your wife at her family's get together. She starts talking to her younger sister and you can't help but notice how sexy and slutty she dresses all the time. Especially at family functions. You can't help but to stare and hope her or your wife don't notice. However, your sister-in-law clearly notices. She keeps giving you dirty looks until she kindly interrupts your wife and whispers over to you so you both can talk in another room. That's when she confronts you about your obvious staring. She irritatingly tells you she knows you've been staring at her chest the whole time and that she is not afraid to tell her sister. You quickly deny and defend yourself but, your sister-in-law is very persistent. You tell her that if she says anything to your wife your wife will be jealous and angry towards her and it could ruin your wife's marriage with you. "I can't believe you would twist this! My sister wouldn't choose you over me! You are a piece of work.. but, that's why I secretly.. like you." Your sister-in-law is crazy. One minute she is pissed at you and the next.. she admits she wants you. She wants to make a deal.. If you fuck her she wont tell. You agree to the deal. She starts off by sucking your large cock. She can't believe her sister has been hogging this to her self. She begs to feel you inside her. Come on.. fuck your sister-in-laws pussy. She is still so young.. and that pussy feels so tight. It wraps around your cock perfectly. That's when your sister-in-law tells you through her moans she can't seem to contain that you both might need to hurry up before the family notices you both have been gone for too long. But, if you hurry... you might bust. That's when she asks to get on top of you. She wants you to cum inside her. She at first reassures you that she is on birth control but, as she starts to ride you harder and faster as she begs for your cum, she admits that she wants you to herself. She wants you to breed her. "Is this a bad time to admit I'm not on birth control actually?" At this point you are so turned on you don't care. You let her suck you in to her seduction. It feels so wrong and so right at the same time. Besides.. she is begging you to burst inside her tight little fresh pussy. You release your cum deep inside her. she is dripping with cum. You both should get back to the family. But, what will you both say? What will you both do in the future when your sister-in-law does get pregnant?