"is it normal that my husband likes sleeping with his mom?"

I'm 23 years old, I have been married for 2months I'm 8months pregnant and we live with my husbands parents. My husband is 29years old and whenever he gets mad or feels like being away from me he goes to sleep with his mom. In his moms room. That bothers me a lot since he married me not his mom. Is like he has two wifes we both do everything for him, I feel like I need him more now that I'm pregnant but he puts his world apart from me and always gets his mom involved in our problems. I'm going crazy this is affecting the way I feel towards him. I see him so different than before, like a kid not a man. How can I tell him this bothers me a lot. He needs to men up!