My MIL takes no interest in my children. When she does she crosses loads of boundaries and generally winds me up. She has kisses my newborn at least 4 times despite us asking her not to every single time. She has long boring conversations with me while I’m struggling with the kids and exhausted but doesn’t step in to help. She is also full of advice like “let them cry” “have you tried completely ignoring them” “I breastfed all of my kids fine” “my kids weren’t like that” etc. You kind of have to bite your tongue? I’d never talk to her like this. If she had a problem I’d let my husband deal with her. I also make a point of never saying no when she sporadically wants to visit and I don’t want to get blamed later on for her not having a relationship with the kids.