Feeling pushed aside.

Me and my partner are expecting a baby. He has a 4 year old with another woman and we have the child once, maybe twice a week. When the child is here my partner puts ALL of his attention on his child, which is great because he's spending time with him, but then he's nasty to me and our animals. He pushes the cat aside, yells at the dog, I had morning sickness this morning and he didn't ask me once if I was okay. I'm currently sat in our bedroom on my own crying, I just don't know what to do. I want my partner to be the loving, caring, partner he is 6 days out of the week, not the person he turns in to when his child is here.

**update, I just asked my partner for a hug as I'm feeling weak today and he responded with, "why?". Feeling so alone right now.