Help ASAP wills&POA

syd

Ok my partner is 21 and his brother is 26 years old. I just found a constructed will and POA in both their names granting their mom EVERYTHING. We’ve been together for 4 years and lived together 3, common law. His brother is recently engaged and live together, common law.

Is this fucking legal?? She has her signature and it dates January 25,2019. Not 2009. 2.0.1.9.

It honestly looks like she attempted at forging his brothers signature on one of the multiple copies. They have not seen it.