Those of us who ignore Facebook's "People You May Know" feature should start thinking about paying more attention.

A woman in Washington was shocked to discover a photo of her husband and his second wife on Facebook. They were all dressed up and standing next to a wedding cake, which would be tough to misinterpret.

Alan O'Neill had apparently asked his neighbor to process his divorce, but the neighbor never followed through. When O'Neill wed his second wife — a marriage that has since been annulled — he was still technically married to his first wife. And no one would have been the wiser, if not for those damning Facebook photos.

According to O'Neill's lawyer Philip Thornton, the accidental bigamist is "extremely embarrassed and remorseful." O'Neill swears this was all a big mistake.

I've never done anything intentionally wrong in my life.

Even his first wife is being understanding: she wrote a letter to the court saying she believed her soon-to-be-ex husband had suffered enough from the public humiliation of his double marriage.

O'Neill has been charged with a gross misdemeanor and will be on probation for one year. He appeared in court with his second wife, who will probably think twice about making her Facebook albums public.

[Image via Shutterstock]