There are no secrets between your two sisters, Olive and Olivia. When you start hooking up with Olivia behind Olive’s back, it’s only a matter of time before she tells her twin. The twins call you into their room and Olive confronts you about your “gross” activities, but your perversions aren’t the worst of it. The two of them share some very troubling news—Olivia is pregnant with your baby!
For the twins, a singular pregnancy is unacceptable. They’ve always done everything together and pregnancy should be no exception. In order to keep their bodies identical, Olive has no choice but to be impregnated by you as well. Although she’s mildly disgusted at first, she quickly takes a liking to sibling sex and a filthy familial threesome ensues.