MIL Issues

My husband and I don’t ask my MIL to watch our 16 month daughter because we don’t trust his mom alone with her. I honestly prefer not to be around her as well so we haven’t really seen her either. She’s a narcissist who only thinks about herself and is constantly talking negatively about people, even her own kids. She’s never made the time to build a relationship with me and I have been with her son for 15 years. I have made efforts on my end and she’s made faces at me or has talked baldy about me behind my back to other family members. Ever since I gave birth she has attempted to be nicer to me but it just feels fake because I know she just wants to see my daughter. Anyways, she constantly makes comments to my husband about babysitting. Saying if we ever get tired she can watch our daughter. She says it every time she talks to my husband or sees me and I’m trying to find a kind way of saying no so she can stop asking. Also when I gave birth the first thing she said was she can watch the baby for us if we wanted to go out. Never asked how I was doing. My pregnancy was very high risk due to health issues and she never once checked on me during pregnancy either. She would vocalize how exactly she wanted to be involved and how much. Everything was about her, even postpartum . I think this adds into why I don’t care to be around her.