Monster in law won't shut up

I need to find a way to get my nosey mother-in-law to shut up! She is already making Detailed plans for the baby and I am only 18 weeks. She is controlling and rude. Last time I talked to her, she told me how she wants me to deal with my husband, she also told me that I will probably have postpartum depression just because she had it with my husband! I thought it was rude!