Pregnant and concerned about car litter

Since my dad passed in july, my mom lost her husband/best friend. My mom says she wants a cat. So I told her I would get her one for her Birthday. But I'm there all the time, and I know the cat litter is not good for pregnant women, and I'm 9 weeks and 3 days. I know I can't change the litter but would it affect me if I were to breath it in. Any comments would be appreciated.