Don't shout daughter, if your mother hears us she will kill me!!

The stepfather is having an affair with his stepdaughter and they are having sex in the house while her mother is there, so he asks her not to scream and not to let her moans be heard because if the other girl finds out what is going on in this house in secret, one of them could be left without balls because one of them could end up cutting them off, hehe, that's what happens when two perverts get together.