My girlfriend is fucking her brother-in-law. She goes to visit her sister and gets fucked by her sister’s husband. Her sister is home on many occasions and so knows about it. My girlfriend is thinking about giving up her apartment and moving in with her sister to save rent money. That’s the excuse she gives me. She doesn’t know that I know the truth. She wants to move in with them so she can get fucked more often and more conveniently without driving across town.
Should I play along and tolerate this?