This makes my blood boil 😡

So I had went to my partners nephews birthday and when everything was said and done his niece who is 12 mind you was showing off to the boys (no surprise her mother does the nasty with every guy she can get her hands on) and my partners mother told her to stop being prissy and to stop having an attitude and she ended it with "you bitch" now I didn't step in because I was feeding my 3 month old and didn't wanna cause a scene at the park his mom even says she's gonna turn into a whore when she get older if not now I'm sitting there thinking this is a child a whole CHILD she's talking about

Well alot of people heard her say it and was giving stares and all so I packed my stuff up and left I was so angry

Makes me wonder if when my kids get older will she do that to them

I don't even trust her to even touch my child anymore

What can I do in this situation I really need advice

Also the child's mother doesn't need her 3 kids from what I've seen they need a good stable home with people that can actually provide for them

I feel so bad for them but where I live cps doesn't do crap