My current situation

I’ve been dating this guy for a few months now. He is 6 years older than me, and doesn’t have a lot of experience dating. I’d say I’m probably his 3rd girlfriend which I’m sort of glad in a way but also worried. He lost his dad a few days after we started seeing each other, and during this whole time I have been with him through it all. I just feel like there is tension between his mom and I. ( which to clarify guys she has never remarried, and never dated anyone. His dad remarried and was with his stepmom for almost 8 years. He doesn’t really view his stepmom as a mom figure, and treats her like garbage.) At first at the funeral she was happy to meet me, and it wasn’t until I mentioned that I had two children of my own that she started distancing herself from me I guess. ( keep note that she is lutheran, so his my bf and I am agnostic. I respect everyones beliefs.) I tried texting her and she doesn’t bother messaging me back. Every time I hangout with my bf and his family it feels like I can’t kiss him or touch him when were around his mom. ( like I’m stealing her bf..)

I am also uncomfortable with their relationship because it seems like she drinks a lot, and Everytime my bf hangs out with her Hes practically drunk. Last time he was so drunk he had someone take him home. No one bothered to tell me and I thought he got into an accident.

So now I just don’t hangout with his family for now at least until i figure out how to talk to her or him. We talk about the future as well, he keeps telling me he wants to marry me one day, and he also wants to move in with me. I care about him alot, i go to church with him, and I do what I can to just be there. Its just so uncomfortable being around his mom. Is this normal?. I mean I have a son of my own, and maybe its just her way of saying hey don’t break my sons heart?.

Its also odd to me how he works at the same school as his mom.