"Teen Mom 2" star Leah Messer has a lot on her plate, including three young children. The reality TV star is currently going through a custody battle with her ex-husband, Corey Simms, and is having relationship problems with her current husband, Jeremy Calvert. In a sneak peak of the July 30 episode obtained by Us Weekly the young mom reaches her limit with her three young girls and spanks one of them on camera.

"I just picked up the girls from school and they're totally out of control," Leah, 23, says in a voiceover. "I'm just feel stressed out," Leah tells her friend Amber who is helping her take care of the girls. "I forgot that today is the first day they've been back ... It may be the transitioning from his (Corey) house to my house. I mean Ali does good at the whole transitioning, it more Gracie."

When Gracie does not follow Leah's orders to pick up a toy, Leah reacts by standing up and removing her daughter from the room. "You're not gonna act like this in front of people. Do you understand? I've had enough," Leah says. Aleeah Grace (Gracie) can be heard crying and screaming "No!" while she is being spanked.

"I had to spank her," Leah admits to her friend. "I feel bad because I spanked her." Leah's friend tells her not to worry about her way of disciplining, saying, "We were raised the way we are in West Virginia, anyways. Like, I was whipped and I turned out OK."

This is not the first time Messer has spanked one of her children on camera. She also spanked Gracie last year, according to Wetpaint.

"Teen Mom 2" is on Thursdays at 10 p.m. Watch the clip of Messer getting frustrated with her daughter below.