Help!

My husband and I live with my parents. I am 29 weeks pregnant. My dad smokes in the house when he's home.(he's at work from 7am-5pm). I can't tell him to stop smoking, it's his house. My mom has stopped thankfully. How would I handle it?. I'm thinking it's time we move...

I've asked him to stop, my mom has even asked him. No luck. =(