you will hate what I say - but here goes anyway :
i think you will be like this forever unless you take drastic action.
you need to end this codependency - write her a formal letter -that as she is an adult who is not working, not contributing you are no longer able to afford to house them
as of 4 weeks time you will no longer be able to live at 123 address.
sign and copy in local authority housing department, social services department
advise her to make contact with housing office asap - it is her choice if she doesn’t but make clear that you mean business and on the date she is no longer living here.
on the date - you take her keys and offer to drop her at the housing department.
harsh? - yes undoubtably - but no more harsh than what she is doing to you. What she is doing is abuse and you are colluding in her behaviour and will never stop her as she is entrenched.
as a vulnerable adult with asd they will have to put her into temp accommodation or help her.
it will break your heart to do it but I cannot see her improving any other way as everything you offer she throws back in your face.
she will then have to put her energy into getting herself together - a job, benefits etc. she will have to engage with services
I speak as a mother with asd who had to make my child with asd homeless like this. Was awful but it broke the cycle. He did temp accommodation on benefits, then got a job and now lives independently in a little council flat - no benefits - working , engaged with my services and had therapy. am so proud of him .
We have an ADULT relationship which is brilliant. We can talk rather than him just blame us for everything. He is able to reflect and understand better as the therapy has helped so much.
We were at total breaking point - breaking the cycle by evicting your child is most definitely a last resort - but it changed everything for us and changed all our lives for the better.
many will think I was barbaric to evict my child - but unless you’ve lived with this level of abuse (no matter what the cause - asd is the reason - not an excuse for the poor behaviour and manipulation) you cannot understand what it does to you as a family.