You do nothing

Having seen and said enough, you turn around and exit the room—you're happy to note that no one stops you. For the next month, you don't see or hear from your sister. However, you know they are still fucking her hard because when the men come back, they have very little energy for sex. That is not to say they don't fuck you. They just don't put effort into it. Which actually makes you happy because you really hated the **** stuff anyway.

Three days into the month, you are returned to your brother and still different not pregnant.

Twenty-eight days later, you finally hear your sister's voice while your brother was half-hearted fucking you from behind but what she says was never any you expected to hear her say.

"Please, daddy feed me more cum… look, see, I'm pregnant just like you wanted." You look up from your brother's desk to see her naked body chained to your father's desk and sitting on her ass like a dog and holding up a pregnancy test.