Incest with freeuse for oldest male

I think before saying, "I chose………… A new law that says that the oldest male of a couple has freeuse to fuck any female that is his mother, sister, or daughter."

"How would this work with the father being the oldest male." The being asked.

"If the wife and husband have a daughter the husband can fuck the daughter, but once they have a son the husband can no longer use the daughter but can still fuck his wife has they are married, and the son can fuck his mother and sister and any daughters he has until he has a son of his own, which then the effects move onto the new son." I said thinking of what I want.

"Since you got the change of the world down... The world you'll be in is?" The being asked