Couple trying to get pregnant

I apologize for the picture but I don't have one. I only remember the story of the porn. The porn started with a couple (husband/wife) having sex in the room trying to get pregnant but they were interrupted by the girl's mother visiting. They stopped and came out of the room and tended to their mother. They had sex without her knowing and the girl saved the guy's cum in a mug so she can put it on her pussy. Eventually they were caught. That's all I remember.