Should I leave him ?

So I’ve known this guy a year but we started officially going out 2 months ago. His moms birthday is this Saturday and he isn’t taking me but his bm is going . They have 2 kids together (2&4)

I told him I didn’t like she’s going and I’m not and he said he doesn’t want me to meet his mom cuz it’s too soon and I said well why is his bm going and he said his mom invited her like she does every year . I asked if his mom knew he had a gf and he said idk but she know he not with his bm. He said he’s not worried bout what his bm thinks if I go but his thing is me not meeting his mom yet . Sounds sketchy to me.

Should I leave him ?

Update-

I don’t have a problem with his bm being around . I know she will always be around . I accepted he has kids . But why be in a relationship if you are still going to be around your bm and not make it known you are in a relationship? I think at this point they should only coparent and exchange the kids .

Amd yes we been official 2 months but we been doing couple stuff and been committed for almost a year . And I met his 4 year old already twice .

Can meet his kid but not his mom? Like huh??