My mom (89) re-married 15 years ago, he's 90. I just discovered he's been having her sign checks. He's cashed over $50k from her acct. Appears this started right around or soon after she was diagnosed with Alzhiemers in 2014 and checks he's cashing have gotten larger over the last couple of years. They have a pre-nup agreement stating that they're keeping their financial matters separate. I am my mom's financial POA -that's how I discovered this as I recently took over her finances due to her declining memory. Since they are married and somehow he apparently gets her to agree to sign blank checks, then he fills them out and cashes them... do I have any recourse legally or otherwise against him?