Mama in law drama

For the two years my boyfriend and I have been together, she's been relatively nice to me, welcoming and I have been the same in return. Deep down I knew she didn't like me one bit, but I would still be nice and respectful to her.

So this weekend, I was over and in my boyfriends room. Mind you, he lives with her, but he has his seperate basement apartment area. So I was changing and we did have our minds on having sex, but I got distracted by something he was showing me so I layed down in his bed, yes naked.

His mother called him but he ignored her even though I told him to answer her, he doesn't know what she's calling him for. Next thing I know before I could get up and finish changing she barges into the room, sees me and leaves.

This was Saturday and I'm still so embarrassed. I left not long after I apologised and left. My boyfriend came over the next day and was telling me his mom was telling him she never wants me over again (understandable, I already told him I wasn't going to be coming over anymore) but she was going on that I was manipulative, evil, a liar, jealous, that I would get him arrested for no reason ( she has called and lied to the police that he would have her in a corner, he put hands on her etc, 3 times in one year each time he recorded what would be happening and no, they don't really have such a good relationship). She also told him to watch out for me, she doesn't trust me.

I get it, she's upset, she has every right to be and I'm not blaming her for it. It was my fault, and I do feel bad about it, but my problem is now I feel like I'm constantly watching what I say or do cause I really don't want to be seen as manipulative. Im not like that but after all of this, im worried shes jist going to take jabs at anything we do that she doesnt like and say Im tricking him into it. She went ahead and told people what happened and how she thinks of me; their cousin who I barely know is sending me messages with her number to call her, she wants to talk to me and all that.

She's also not an approachable person. My boyfriend tried to talk to her about what happened and that I felt bad about it and apologised but he said she wouldn't even let him get a word out, that was just screaming at him how much of a bad person I was and all kind of things I would do to ruin him, she doesn't trust any woman etc. It's too the point where now that he doesn't trust her and is staying away from her.

How do you deal with that? It's literally just his mom and anyone she talks too that doesn't know me that thinks this way about me. His dad loves me, his step mother adores the life out of me, his siblings like me. I don't want this woman to ruin our relationship