Thisismyfun123 - Perverted

“I’m sure that when you move in, he’ll quickly accept you as his superior and will do whatever you tell him to do, and he won’t do anything to interfere with your sexual relationship with me.”

Your sister can be both relentless and quite persuasive, so you knew it was inevitable that eventually she would wear down your wife’s defenses and your wife would join your sister as a cuckolding spouse. 

You and your wife had discussed starting a family. It looks like she is probably going to be becoming pregnant very soon.

[modification of another capper's work ]