Ugh any advice would help !!! Super long

Ok growing up I was sexual harassed by my brother and my cousin. However, my cousin actually took it far when I was 6/7 and molested me and continue to harassed me. I grew up hating myself sex became my escape. I slow down once I had my son and daughter. But since still not fully healed when I see the faces that cause me self hatred. Any who I met my current bf and told him about my past 3 years old ago, he's been working with me. Yesterday we were going out and he ensured me the kids would be fine, which they were but mother came home and discuss with my mother that my bf 6 year nephew told my daughter to lay down on her stomach so he could jump over her. My son told and I told my bf and he said to tell my mother not to come at him with BS that he was playing and my mom can talk his mom, because she is the one that is responsible for his nephew. Idk if my mom feels guilty that all has happen to me and she had no clue she found out when I was 18 I am 27. She now she want telling me what I should do to protect my kids and she hates my bf cause we're pregnant and she don't feel we are ready. I don't know if she blowing this situation up or if she right? I hung up on my bf and been ducking as we speak because he know what I been through he should understand my fear. My bf is 31 and him and his mom been calling me my mother is getting on the nerves. I just want to take my kids and run away from everyone. Everybody is getting on my F'n nerves.