Yep...I know a guy that had substantial money...
He started getting on in years, and became pretty vulnerable...
He eventually married a woman 27 years younger...She and her own family took him for almost every dollar he had...When the old guy died, only his daughter and son were at his funeral....He died nearly broke, barley able to afford his medicaitons....I was told, he only realized he was being taken in the final month of his life.
My parents knew an old guy who married a middle aged woman and some of her relatives ended up killing him. The new wife's family is sometimes the greatest danger.