Sounds like you have a major Momma's boy on your hands. If he hasn't already cut the apron strings, then there probably isn't a very good chance that you are going to be able to have any serious impact on steering him away from his mother or not seeing and talking to her as often. More often than not, if forced to choose between the girlfriend and his mother, he goes for his mother. I suggest that if things aren't very serious just yet, you break it off because otherwise you are going to have miserable marriage and unless he realizes the truth to the old saying "A son is your son until he takes him a wife, but a daughter is your daughter all your life," you will still end up being subjected to his mother and the rest of his family, like it or not, and so will your children.
Sounds like your a biggot. If the family was white would you have that issue?
When in a relationship you do NOT own the person you are with. If he gets wind of your spiteful behaviour he wont see you as he once did and then could you handle him looking at you in a much lower esteem?
She will always be his mother....if you loved your boyfriend you should be glad he has had such a good upbringing and shares such a great relationship with her. Something else too....if it wasnt for her influence you wouldnt have such a nice guy.
Be more gracious and take a good look around at any bad families if you can.....then you`ll realise how much you need family because its a hard world out there. You are very lucky to have influences of her black heritage and your children will need it too....think carefully about what you`ll be depriving them of.