Leah Messer Breaks Down Into Tears After Ali's Breathing Test Results

Grab a tissue because the season finale of Teen Mom 2 is this Monday night!

Leah Messer breaks down into tears after her daughter, Ali's breathing test.

Plus, Chelsea Houska slams her baby daddy, Adam Lind, after learning that he broke their custody agreement and visited Aubree at his parents house. Their agreement states that he is only allowed to see her at a visitation center.

Watch the clip above! Teen Mom 2 airs Monday nights at 9pm ET, only on MTV!