Drama reaches an all-time high this Thursday during MTV's "Teen Mom 2" Season 6 Episode 5 "Can't Trust Them," and most of it is between Jenelle Evans and her mother, Barbara Evans.

Fans may recall that Jenelle's son, Jace, has been exhibiting bad behavior in school, according to his teacher.

In the video clip, Jenelle calls her mother to ask why she scheduled Jace's parent-teacher conference at a time she cannot possibly attend because of her classes and the driving distance.

"I had to do it on my day off," Barbara says. "I could not change the day."

Jenelle told her mother that they talked about it previously; her mother asked what her school schedule was and said she'd schedule the meeting so that Jenelle could attend.

"I have school on Tuesdays and Thursdays from 8 o'clock to 3:20 p.m. So, you schedule it at 3:30 p.m. when it is an hour and a half away from me," Jenelle says, exasperated.

Her mother suddenly changes the subject.

"I am sorry. You wanted to go to court. You're telling me you're taking me to court, so I hired a lawyer yesterday,' Barbara says.

Jenelle points out that she's had no choice but to take her to court since Barbara won't let her see Jace.

"Because we're going to court, you can't see Jace right now because I have to make sure that he is not going to get upset," Barbara explains.

The two continue to argue until Jenelle loses her patience.

"F*ck you, dude. I am so done with you. When I get custody of Jace back you will not see him for as long as you f*cking withheld him from me for. I'm done with this."

Meanwhile, Kailyn Lowry-Marroquin returns from her Los Angeles trip to visit friends. She is furious that husband, Javi Marroquin, interrupted her fun. At one point during her visit, the friends enjoyed a night out during which time he texted her all night long, writing such things as, "Your kids are here. You don't need to stay that long. You are a bad mom. You need to think about your family."

Kailyn's friend finally took her phone away.

In a sneak peek of "Can't Trust Them," Kailyn is driving home from the airport and calls Javi. She tells him that she can't even come home and work things out with him because he has humiliated her in front of her friends.

"This is ridiculous. I am so f*cking humiliated," she tells him in tears.

Don't miss "Teen Mom 2" Season 6 Episode 5, "Can't Trust Them," that airs Thursday, Aug. 6 at 10 p.m. ET on MTV.