Your question is very unclear. But if your name is on a deed you don't have to sign over your share.

Unless the will is admitted to probate it has no legal effect. If a probate case is not opened by your aunt, then your mom needs to open one as if...

You can try suing in small claims court, but thats about it.

No, even as an incarcerated individual he can inherit.

Whatever your will says will control at the time of your death. If you leave property to certain people at death, it would go to them. However, if...

His children inherit everything and she has no claim to anything. If you are worried about his possessions go change the locks on his house.

If your son is not willing to give you his POA, then you need to file for guardianship over him

You need to immediately file for guardianship over your mother if her named power of attorney is mentally disabled.

You can get a death certificate yourself from the state. You could try suing in small claims court for the personal items.

Your question is too complex to answer here. You need to have an attorney look over all the paperwork that you are referring to in order to make a...