OP isnt really saying anything that can make any certain its one way or the other.
I am a single parent with depression and anxiety and having counselling. I dont speak to my parents and manage to parent both my kids and soon after them just fine.
My depression and anxiety is classed as 'severe' but everyone is different.
Again, she may not be able to parent her child or need a lot doing. Or she may be milking it.
OP wont even answer how long she has been the and what her dh means prioritise him.
Does he mean 'we have plans and you always cancel because dd and dgd need a drinking bringing in'
Or 'no one else should eve be put in front of me'
Or is it a mix of everything and a family struggling with changes and all these issues.
I know one mum that used to go to her boyfriends for the evening, but go back to her house (10 minute drive) if her adult sons wanted a drink. She would go home and take a drink up to their room, then go back to her boyfriends.
I also work with a woman, who is at breaking point because her dil and sil have just decided neither that he isnt returning to work either and they might lose their home. This woman is trying to help them out but is killing herself and crippling herself financially. Whenever this woman wont give into her daughter demands, the daughter threatens to kill herself. In the end SS got involved. It's awful
And there are loads of men who demand to be the centre of attention all the time.
No one can say if this is one extreme or the other, or just a group of people struggling.