Mil rant

My mil and I have had our share of disagreements. She said and has done a lot and I've had to stand up for myself because my husband can't. His own sister said if mom would slap our toddler son, my husband would say well,, maybe he deserved it. And his dad said he needs to stand up to his mom. But he doesn't she's so passive and it's now mostly him. They both have done stuff to me. He's reacted to my feelings being hurt and being respectful and saying hey I that hurt my feelings towards her. So its been a long thing. We are polite to one another but she can be so passive sometimes. And she does random stuff like text he really late and I don't respond because I'm sleeping and she tells my husband I didn't respond and I usually do the next day when I see it and he gets all upset with me. So how do you guys deal with it? Because I'm pregnant again and I see what she does and he will never see it and some stuff isn't so huge but it bugs me. My husband has been out of town for 2 weeks and he says oh Mt family,oh my mom can help. His dad was the only one and I don't expect it. But because his mom is picking him up since he drove his car and left if at her house close to the airport. She wants to text me really late, the day before he comes home. And asks how I'm doing and she's here if I need any help. I don't respond because I'm sleeping. And my toddler wakes up and is giving me a rough time so I text my husband just to vent and I'm not going to text her back because she isn't up yet and he wants to be all cold in the texts. I already know it's because she ran to tell him. She does this to say look,I'm supportive, when in reality it's too late. She does it to look good in front of her son. And she does it to also create issues with us. It's not even her, it's him. I just don't want it to get to me anymore and I want to be able to not be scolded if I didn't so something right away. I have other problems then to be so worried about her over small stuff.