Please help???!!!!!!!!!!?

Hi I'm really worried because at the moment I'm living with my boyfriend at his mums house because I have no where to live right now. Me and my mum don't speaker do I can't stay at hers!! I have nowhere!! Anyway I have a baby girl and my boyfriends mum is really selfish and smokes in the kitchen!! I've asked her if she can go outside so many times and she just refuses:( I'm soo scare it's going to do something bad to my baby because she's 4 months now and his mums been smokin in the kitchen ever since she was born!!! I'm really worried:(