Mom and sister don’t want to see my son

This group has given me great feedback. I have a 2 year old son. My mom and sister have seen him a handful of times even though we live 20 minutes away from them. I never had a close relationship with my mother. She’s toxic. Never said I love you growing up, spoke badly of my father (they were divorced) and said hurtful and somewhat abusive things to me growing like “I wish never had children” or “your sides are spilling out of your pants”. I was sexually abused at 12 years old for several years and my mom later told me it was my fault when I threw a tantrum about it. I didn’t know how to process it at the time and it took me a long time to have healthy relationships. I was damaged. Fast forward to now after years of therapy and an honest look at myself, I have a VERY healthy relationship with my husband and son who will never know what it’s like to not feel loved. I probably overcompensate and give my son an excessive amount love and affection! My mom can get petty and not talk to me if we fight. She stonewalls me and she is not the kind of person to apologize, be the first one to call or take any kind of ownership. We got into a disagreement when I was pregnant and she stonewalled me. This time I didn’t have time or the energy to reinitiate the relationship. I texted her when my baby was born and all I got from her was congratulations. She didn’t ask to see my baby or call/text until I texted her when baby was 4 months. I invited her to a few family get togethers and she showed up but then I haven’t heard from her since baby was 8 months and he’s now 2! Only time I heard from her was when she recently sent my husband and I a book on marriages/relationships. Weird. My sister followed my moms footsteps and although she isn’t as toxic she definitely takes my moms side. She also stonewalled me. We got into a disagreement when I was pregnant and she stonewalled me even when I tried to reach out and talk about it. She didn’t answer my call, texted “all good” and stopped talking to me like my mom. I reached out to her when baby was 4 months and she was a little nasty over the phone but I remained calm. I also invited her out to see baby and she came but then just never called/texted so I let it be. I can’t be the only one calling and texting! My sister recently liked all my stories on Instagram and commented on how cute my son is. I think that’s her way of reaching out. My uncle said she also bought a book on narcissistic mothers which is huge for my sister because she never admit my mom was toxic in the past. Now I have an urge to reach out to my sister or both just to have some company I guess but I’m wondering if I should just stand strong and not reach out? I used to have poor boundaries with them and my therapist has helped me be ok without them. I went through a lot of pain and grief when they didn’t reach out to see my son or be there for me when I gave birth or whatever. I don’t know. It’s just really sad to me that they don’t want to see my son and hang with us. I know they’ll never reach out if I don’t call/text. So many mixed feelings right now. Another part of me wants to text her and tell her to not send anything to me like the book but maybe she wants a reaction good or bad. I guess i am having a hard time now and don’t know what to do