My husband treat my son different.

Ash

I am married to my husband. I won't say it's all good. But like every marriage there are good days and bad days. I just wish things was different. My husband treat his step son so different and it bothers me alot. I work two jobs and go to school and when my son has a special event he just drop him off and doesn't support him at all. He gets made at me when I talk to his dad. Which doesn't make sense at all. And right now me and my husband is expecting and I really don't know what to do at all. Please give me some advice?