My relationship is suffering because his mom

She began babying him recently and it’s been getting worse

Every time we’re at home she stays in the room with us the whole time and only talks to him.

I used to cook for the both of us and the whole house , and now she beats me to the kitchen to cook for him and her but won’t make me anything.

I’m vegan so I try to make foods we both can eat together but when she cooks for him she’ll ONLY make meat , no starches , veggies , anything ! so we can’t eat together.

He stopped standing up for himself because he just wants her to be happy because she’s so sick but I went from wanting to be around him 24/7 to just when I have time to deal with hearing his mom. She makes him so stressed out that his whole mood will be shattered and I’ll have to try to pick up pieces and it’s stressful. When we first got together she NEVER spoiled him like this and she wasn’t so deeply involved with his life. Now it’s gotten to the point she has to know where we are all the time , he has to ask her for permission to do everything and he’s turning 22 next month. I’ve tried telling him I’m uncomfortable but I don’t know how to show or tell him that’s it’s pushing me away.