File on your own behalf, modify the existing form and try again.

If your mother is alive she can testify as to her intent with the house as a gift to ONLY you. Your 13 yo may have to participate in reunification...

They will need to evict you from the property. You need to tell the utilities that you are a tenant. The will should be filed with the probate...

A 4 yr old should be okay in this situation.

Call the police where she is and ask for a wellness check.

Your mother can begin the eviction process after the child is emancipated.

If you has dementia, your mother may not be competent to sign a POA. You need a lawyer to meet her to ascertain her competency.

Without documentation of paternity it might be impossible, but try to apply for SSI death benefits and see what happens.

You need to file a paternity case and deal with custody, parenting time and child support.

Report them to CPS. ....