Controlling or no?

So I just left an abusive relationship where I was constantly controlled. I left and have been at my moms house about a week now. I’m 6 months pregnant and I’m unsure if I’m overreacting or what. Anyways I am 32 years old and my mom welcomed me into her home. With that said, tonight she was acting weird and slapped my butt. Which I didn’t appreciate at all so I blew it off. Then she’s running her mouth saying my son is going to take over my life the 1st year, for 1 I already know that. For 2 I told her I dealt with enough psychos today which I have. Then I said I’m going to the store, told my dog good luck then decided to bring her with me. So my mom says yeah go to the store, you might wanna watch how your talking to me, this is my house. She kept repeating herself. Which cool her house, I didn’t tell her how to run her home. However when it comes to me, I am going to be a first time mom. I’m not sure if she’s trying to control me by saying it’s her house or not. What does that mean for my son? Is she going to think she’s my sons mom since it’s her house? Like I am my sons mom. She is the grandma. Idk if I’m over thinking this or not. I guess nobody would really know since your not her. Maybe offer me some advice because I’m still on edge from my relationship I just got out of. Please don’t be mean either.