Oh this is a fun one.

A woman called the house early one morning and told my mom that she'd been in a relationship with my dad and had only just now worked out that he was married. She was very apologetic and wanted her to know.

What followed was nearly a year of doing our best to unravel what the hell was actually happening vs the stories we got out of this woman and dear ol' dad.

He'd started his career as an architect and got married at the same time, some thirty-three years before this happened. He had created a new, separate bank account he didn't tell his wife about, and skimmed a little of the top of every paycheck. He used this money to occasionally buy himself stuff like car parts. Aside from the fact the account was a secret there wasn't much inherently wrong with this.

However the percentage of money that was skimmed kept going up. And after he made partner at his firm, he just went nuts. He kept a minimum of two girlfriends at a time. He bought them cars, boats, and entire houses to woo them. He made time for all this by not going to work - he'd cruise in late at night on the weekend and rubber-stamp all the drawings he was responsible for.

As you might expect this ended up causing some terrible problems, and his partnership was revoked. So to make up for that lost money, he started embezzling shitloads of money. When this was discovered, he was finally fired. But he didn't tell anyone about being fired, and instead committed 401k fraud, insurance fraud of various sorts, and unemployment fraud by collecting in three states at once.

My mom finally filed for divorce, and though it sucked for a while now I can say she's never been happier.