Now he and his lawyer are coming after the other siblings to cover all the expenses. I don't think the siblings are responsible for the misdeeds of another, especially after all the animosity thats been displayed, since the responsibility was taken away from a fiscally responsible one, and given to the greedy one.
the POA may be pulling your leg.
have you received something in writing from the lawyer? or are you just going by what the POA is telling you?