Son And GF Caught By Step Mom So Now They Have To Fucking Do It Or They'll Get arrested What does a cheating girlfriend do to her step daughter? She tells her all the things you would expect from a cheating girlfriend, like she goes shopping with friends and leaves the house in an incredibly early hour and has someone else to meet her for dinner. But this isn't all. This is what Son And GF Caught By Step Mom must be going through because of their relationship, and this might be why they're such a psychotic, sadistic force on the show..