If he wants you to change for him, he's not worth it. He should love you for you, not how you dress.
Boyfriends shouldn't need diapers. If he does, it should be his mother changing them.
SOMETING CUTE
Depends on the relationship you have with his mother. How close and what not
Because your boyfriend's mothers does not appear to like you then you should be asking him. If he doesn't give you an answer then perhaps you could privately speak to his mother and ask her and perhaps she will get to know you a little better and change her mind.
Why would it be illegal? There is no family relationship.
It means she is changing her hair colour!
Her mother designs her clothing.
Feeling awkward would be the common thing to do!
If your mother is divorced or a widow then she has the right to her privacy and if she said she didn't have any boyfriends she is probably telling the truth. Even if she is still married she gave you her answer and you are going to have to trust her on that.
Answer You could ask your boyfriend why she is doing that and see if he knows anything. Maybe she has misconceptions about you or believes something that is not true. Some mothers are just like that. If there is nothing in particular that you know of that would make her do that then she is probably just a meddling mother and will always be all up in her son's business even after he marries and, believe me, you don't want that.
luck
You need to be as nice as possible no matter what happended between you to! Good Luck!