Parents going overboard?

My husband and I live in the same city and are close to his parents and family. My parents live a few hours away. My mom has some mental health issues and we've always had a lot of problems. Ever since telling her that we're pregnant, she constantly sends me pictures of furniture and baby items she has bought so that the baby can have a room at her house. My husband and I have already discussed that we don't feel comfortable with the baby ever staying there or alone with my mom. I would never want to say that to her, but I feel horrible that she keeps buying things , even though I've asked her not to. What should I do?