In a sneak peek of "Teen Mom 2" Season 6, Episode 8, Jenelle Evans has a difficult time accepting that boyfriend Nathan Griffith wants her to date other men.

Evans calls Griffith from her car to ask him what's going on since she's not heard from him.

"I want to see if somebody makes you happy where I don't make you happy anymore," he says.

"You would make me happy if we were just together again. I want you and only you," she says. "Don't make me go out and try to find someone."

There's a pause, and Evans' seems to lose her temper. "Am I supposed to just sit here and let you hurt me?" she asks.

"Listen, I'm not doing this right now."

"I only want you, Nathan," Evans says on a sob. "What is it about that you don't understand?"

Her crying softens Griffith who ends the conversation telling her "we'll talk."

Another "Teen Mom 2" star is in emotional turmoil over a looming divorce and custody threats: Leah Messer. In the last episode, she told husband Jeremy Calvert her decision to enter an inpatient treatment program to deal with her issues.

In a video clip of Thursday's episode, Messer meets with ex Corey Simms and his wife, Miranda Simms, at Roni's restaurant.

"I wanted to talk with you guys about some things and I'm going to need help with the girls," Messer says, looking uncomfortable. "I have to do this therapy where I go into this facility or something. It's a more intense therapy."

"Is it rehab?" Corey asks.

"No, it's nothing bad."

Miranda asks how long she will be gone to which Messer says "Just a few weeks."

Corey seems suddenly upset. "I don't know what in the hell happened where in the hell this therapy stuff came from I mean there's a rumor going around town that you're getting a divorce," he says.

"Yes," Messer says, frankly.

Corey says that the impending divorce is none of their business, but if it happens, it will be since their kids are involved.

"We'll be willing to watch them while you are there," he says, referring to Messer's stay at the treatment facility.

Miranda asks Messer if she thinks that she'll be able to deal with things better after rehab.

 "Oh yeah. I feel like that by me going there, I'm going to be able to be a better mom and be the best mom that I can be," Messer says.

But when Miranda asks her if she's owning up to the fact that she has not been the "best person for your kids," Messer gets defensive and says, "I'm not going to say that I was a bad mom."

"Can you look me and Miranda in the eyes and tell us there's no drug problem?" Corey asks.

Messer does her best to make eye contact and look convincing. "There's no drug problem."

"I think I know that there's a drug problem," Corey says, staring her down. "And I think that you're afraid to tell me."

Meanwhile, in a surprise show of solidarity, Javi Marroquin helps Kailyn Lowry's ex and baby daddy, Jo Rivera, move into his new home in their neighborhood.

Lowry asks Marroquin if it was awkward. Marroquin said no. Both agree that her son, Isaac, will be happier with his dad nearby.

Watch "Teen Mom 2" Season 6, Episode 8 on Thursday, Aug. 27 at 10 p.m. EDT on MTV.