The upcoming episode of "Teen Mom 2" season 6 might be the most dramatic one yet. A preview for episode 5 titled "Can't Trust Them" shows Jenelle and her mom Barbara bickering over the phone about a schedule mishap in Jace's school. 

In a promo for the upcoming installment, the mother and daughter quarrel as the latter complains about her mother setting the parent-teacher conference at a date and time she can't go even after they talked about it. One thing leads to another and Barbara ends up talking about court. 

"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 in the promo. "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." 

At that point, Jenelle loses it and tells her mom, "I'm so done with you," and asserts that Barbara won't ever see the kid again in the event Jenelle wins the custody battle, which she intends to make sure will happen. 

Meanwhile, in the same episode, Kailyn and Javi clash after the latter calls the former a "bad mom." Coming home from her trip to Los Angeles, Kailyn meets up with her friends. During their night out, Javi constantly texts her and urges her to go home, making her feel "humiliated." 

In the same preview for the episode, Kailyn confesses to her friend Sterling, "I'm at a point where I'm only worried about my kids. I don't need a husband. I don't need any man. I'm not going to sit here and spend the next 10 years of my life trying to make it work if it's just not going to work. It's like a broken record." 

"Teen Mom 2" season 6 episode 5, "Can't Trust Them," will air on Aug. 6.