For those who sneak around and have affairs behind their partner's back, getting found out is the last thing they want to happen. But what's worse than just getting caught? Getting caught by a family member.
That's exactly what happened to one woman though, after she cheated on her husband two years ago and was caught in the act by her spouse's sister - who then threatened to tell her brother everything.
The woman, who posted her story anonymously, explained she was having an affair with a man she met through her job, who just so happened to also be her sister-in-law's fitness trainer.
