I'm looking for the name of a hentai about a mother and sister that have sex with the youngest daughters fiance behind the daughters back so that he wont have sex with her because she is to young.
If i remember right the hentai starts off with the daughter and the fiance kissing on a couch in front of the mother who reminds them that they cant go any further. The mother than has seduces the fiance to relieve him of his sexual urges only for the daughters sister to overhear them and do the same later. I think the hentai ends with the daughter wearing either a costume or lingerie talking to herself in front of a mirror about how the fiance wont be able to keep his hands off of her.
I also think the fiance fingers the mother behind a counter so that the sisters cant see what hes doing.