My mother in law won’t leave me alone

So I’m currently 6 months pregnant and my partners mum has done nothing but disrespect me the whole pregnancy even as to going far as to ask my partner to take back my engagement ring and not even ask how the baby’s doing now I live with my mum and my partner lives with his parents when I give birth I’m gonna be living with my mum as my partner doesn’t have his license or a car and iv been taking myself to all my appointments doing everything on my own my partner sends me money sometimes as he lives 4 hours away and is unable to be here due to work iv grown sick of his mum stressing me out and have removed her from social media and all contacts and want nothing to do with her and she’s stated that she has grandma rights and will take me to court my partner thinks it’s ridiculous and so do I but she keeps threatening she will could someone please tell me the best way for me to rid of this woman and her hatred for me I think it might be because my partner is her only son but still this doesn’t excuse her meddling in my relationship