Devastating! Leah Messer Loses Custody Of Her Twin Daughters In 'Teen Mom 2'

Such a heartbreaking moment for Leah Messer! During last night's episode of Teen Mom 2, the mother-of-three learned the devastating news that she lost primary custody of her twin daughters, Ali and Aleeah to her ex-husband Corey Simms. Click through to see the other O-M-G moments from the episode!

Even though the court decision was heartbreaking for Leah, Corey of course was happy with the end result. "What I want for the girls is to have a chance in life, a stable life," Corey explained to his pal.

Even though Kailyn Lowry and her ex Jo Rivera were on good terms for the sake of their son, 6-year-old Isaac, things turned for the worse after Isaac wasn't bathed before school and went in his pajamas.

Kail confronted Jo about the issue and explained that it's a reflection on their parenting. However, Jo got angry that Kail's husband Javi Marroquin got involved in the issue.

And unforunately, while Kail went to pick up Isaac from his Dad's house, she arrived a little too early which irritated Jo and caused the two to break out into an intense screaming argument, which the 6-year-old overheard. Kail later had a sit down with him to explain that people say things that they don't always mean and to never speak to people the way Jo spoke to her.

And here's David Eason! Jenelle Evans and her boyfriend took a big step in their relationship and he met her mother, Barbara!

What was supposed to be an exciting moment turned awkward when Barbara informed Jenelle that she is taking Jace away for Christmas to spend time with other family members.

Eventually, Barbara talks them into joining in on the road trip, which leaves tension between David, Jenelle, and Barbara. Yikes!

Chelsea Houska isn't a happy mama! With her already on bad terms with her daughter Aubree's father Adam Lind, things get worse after he posted an inappropriate photo of the 6-year-old on his Instagram account, which he didn't think was wrong.

Chelsea even took a big step in the child support case and met with a new lawyer, in hopes of being able to increase the child support pay she receives from her ex.

What did  you think of last night's episode? Teen Mom 2 airs Monday nights at 10pm ET on MTV!