At first glance, his proper adult sister-in-law seems to have strong morals. In truth, she is a cock-loving sex addict who is never satisfied, no matter how often she is penetrated or how many loads are fired. Perhaps because she normally suppresses herself, once sex begins there is no stopping her. She keeps demanding rough creampie sex even as semen runs out of her, with no concern for the man's stamina or needs. Like a beast in heat, this insatiable woman only wants more cock.