The great Shift has occurred and your wife was one of the ones swapped out. This once 18yr old college guy is in your wife's body and made a deal to stay with you and help you with the family but you are mad that he is always walking around mostly naked and touching your wife's bod. You start to argue and she tells you that she could do anything she wants out there, there is no obligation to stay and that you should be lucky that she is pretending to be your wife and taking on the role as a woman. She argues further that she has needs too and wants sex, you are mad by it but she pushes you into fucking her since after all "this was your wife's body" while fucking her you are repulsed still but are pushed to go further until you both stop. She is mad again, but still stays as your wife.