Family relationships can get messy—especially with in-laws.

Martha was uneasy when her mother-in-law insisted on babysitting her 4-year-old daughter, Beverly, every Wednesday. She finally agreed, but soon Beverly began acting oddly, talking about her grandma’s “special friend” and refusing to explain. Her MIL brushed it off as a child’s imagination, but Martha’s instincts told her something wasn’t right.

Without telling her husband, Martha set up a hidden camera. The next Wednesday, everything seemed normal—until someone knocked at the door. To Martha’s shock, it was her husband’s ex-wife, Alexa. Beverly ran to her like she knew her well.

Martha rushed home and confronted them. Her mother-in-law didn’t deny it, even saying Alexa was the woman her son should have married. Furious, Martha kicked them out.

That night, she showed the footage to her husband. Stunned, they agreed to keep their daughter away from his mother from then on.