Help!!! My mother-in-law doesn't want us to have baby #2

I feel so guilty to post this but I don't know what to do. She tell my husband that we are not ready for baby #2. My husband wants to have another baby so bad but after she talked with him he's having second thoughts. I mean there's nothing to fear. He has a well paying job and plus I work. Since day one that I met her she's been in our noses. It's so annoying. My husband gets mad at me sometimes because I get annoyed of her. She always had something to say. I don't want to be disrespectful or mean with her. It's so annoying. It makes me mad and want to cry every time she gets in between us. What should I do?? What should I tell her??