Kris Chafin’s life was breezing along–she raised two great kids and over the years never really gained any weight–until she reached 40.

“I gained weight and it was immediate,” Kris recalled. “It was almost in a couple of weeks I was past the ah ha moment–like, what happened?”

Kris was eating healthy meals and exercising and in a little over a year she’d gained about 50 pounds—an ear infection would soon reveal the reason behind the weight gain.

Click PLAY to watch this edition of “It’s not My Fault.”