You do realize every other girl in the game is equally as devoid of purpose or function, right?
They all simply exist for the sake of getting to know, (short little stories) and have sex with.
If "Mom whose husband ran out on her forcing her to work for the mob to pay off his debts" isn't your cup of tea, then fine. But it's a fair bit better than "Adopted Sister who's in love with you" or "Boss who likes to shoot guns and ride motorcycles". or "Gym owner who... owns a gym".