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I am sorry for your family's loss. In Maryland, the spouse has what is known as a "spousal elective share." Per Section 3-203, the surviving spouse is entitled to a third of the net estate if there are children of the marriage, and half if there are no children. Assuming that you are the child of the deceased (or you have siblings who come from both her and the deceased), then the third applies.
The election must be filed within seven months after the appointment of the executor to the estate.
This is regardless of the Will and may be enforced against the estate in probate, and against the trust in most cases as well.
As for the second issue - if her husband was on the bank account, then he had a right to do this regardless of where the money came from. If he was not, then possibly there may be a criminal matter under "financial exploitation." Financial exploitation is the illegal or improper use of another person's resources for personal profit. However, given that they are married, it is unlikely that the prosecutor would pursue charges although one can file a complaint and the prosecutor would decide in the end. To pursue a civil suit, one would first have to get adult civil guardianship of the mother, and then sue him for "negligence per se." If so, then the Judge/Jury decides whether his actions were civilly wrong given the circumstances.
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