There is not enough information to provide much guidance. It appears that you have an attorney, so I would discuss this issue with him/her. If...

I agree with the answer above that you should have an attorney review the trust document. You also did not indicate who is acting as trustee and...

Will and trust

You would need to file in Wisconsin. The proper county would depend on certain facts related to your situation. An attorney should be consulted to...

Should will be handed over to children before death?

In Wisconsin, holographic will are not valid, so the sister-in-law should execute a valid will, if she is able.

My sister, brother & his wife have POA over our mother. Can they just add me without informing me and getting my consent?

It sound like they listed you as the contact person only, and not as an agent on your mother's power of attorney. If so, you can ask to have...

What can the beneficiaries do when the successor trustee promises to sell the stock to finalize our mother's trust and does not?

You can petition the court to remove the trustee and appoint a new trustee to finalize the trust administration.