I'm so annoyed that my mom spent more time with my sister and her son than she has my husband,…

I'm so annoyed that my mom spent more time with my sister and her son than she has my husband, stepson, and I. I've had no alone time with her during my whole pregnancy and all she does is ignore me. I thought she was supposed to be my rock... I'm so upset, but I think it's time for me to just move on and realize I'm on my own.