Amber's Nightmare! Portwood Breaks Down Over Having 'No Control' Of Daughter Leah In 'TMOG' Sneak Peek!

A mother's nightmare!

In a sneak peek clip for Teen Mom OG, Amber Portwood broke down in tears after her ex-boyfriend and baby daddy, Gary Shirley, went against his words when it comes to being flexible with custody of Leah. "This is exactly what I was saying and you knew it," she said. Adding, "He did not hold up his end of the bargain at all, that he would let me have her during school days. This was the agreement, that we would be flexible. It's in the agreement, those words."

Watch the heartbreaking clip above! Teen Mom OG airs Monday, April 17th at 9pm ET only on MTV!