Yeah, I think Teksura really hit the nail on the head. Especially being non - confrontal, ignoring them is a great route to go.

The way your mother disregards your child's safety is disgusting. I would assume she knows the dangers of certain illnesses this time of year and how life threatening they are to a child, especially a new born. She's not only treating your boundary like it's optional for her, but also risking your child's health for her own pleasure.

I tried leaving my family once and pointed out to them all the wrong doings they have done but they just refused of doing any harm. Sadly plans fell through with trying to get an apartment and I was still stuck under their roof.

You also said your half brother went NC? Did he tell them their issues/trauma/wrong doings too? What was the result of that?

"The rest of the family turned against me" & "made her feel like a shitty grandma". Seems like regular manipulation/guilt tripping tactics. And I doubt that will get better anytime soon.

Get out of there and fast. You seem to have a support system through the family that you want to be around and wants you around. Don't torture yourself and destroy your mental health for your need of social interaction with them. I wish you the best.