Op as someone who has both parents living with me one with Dementia please take the following on board;
you are not responsible for your mum...please take this in.
You ARE responsible for your children and this is affecting them negatively.
She needs to be in sheltered housing away from your family home, find a way to make this happen if you can. She is not very old or ill.
Prioritise you and most importantly your children it is their home.
My situation is different as my parents are 89 and live in their own flat attached.
I have had to put in very clear boundaries, l do NOT do caring for my mum, l do financials, medication, organising food deliveries, ( not cooking for them) and oversee carers.
Even that has a huge impact but l feel l can, as they are not in my space, except the hallway and garden, which is huge as we are rural.
My dc hated it when we first moved in, as we were all eating dinner together and they wanted desperately to have just us.....so l changed things after covid.
Carers come for mum now 5 long days a week (8 till 6 pm) my DF does weekends.
I have had to face the fact it would have killed me to be a carer, and face the fact my Dc have to come first, and make peace with it.
If you leave this and your DM gets ill or Dementia moving her will be impossible....please do it now. Let go of the guilt. Good luck.