<human>: Simply put, she barely showers and I allow her gf to spend the night. She loves perfume and the like so the scent emanating from the door is sour+fruity stuff which is awful. She'll stay 1-2 weeks and maybe shower twice (at most) at a time. I wouldn't care about the frequency except for the smell. My sister came around and asked if I'd left rotten fruit in the fridge. 

It's gagging awful. But... If it were my own girl I would know what to say. As is, her mother is very abusive, controlling, and invasive (and other than this mingey smell the girl is so sweet). I don't want to do her any damage. What do I do?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: stepdaughter smells like bad apples but her mum is quite mean so I'd prefer not to be, how do I help?