The young man in the next room saw the neighbor (married) masturbating, unable to bear the erotic moaning, the boy broke the door and rushed straight into the room to "help" the young girl.
Once he got used to it, every day he waited for the girl's husband to go to work, then he sneaked into the house to continue his clumsy love affair, the other married woman didn't object or tell anyone because she was also fucked by someone else in her pussy.