Jenelle Evans and her mother Barbara seemingly ended the on good terms in the season finale of MTV's hit reality series "Teen Mom 2," as previously reported by HNGN. But in a sneak peek for the upcoming reunion special hosted by Dr. Drew, Jenelle and Barbara took verbal jabs at each other before Jenelle stormed offstage.

Dr. Drew attempted to mediate a discussion between the volatile mother-daughter duo about the custody battle between them. In an earlier season, Barbara was granted sole custody of Jace just months after he was born, as Jenelle slipped into legal issues and a struggle with drug addiction. Now that she's sober and attending school, Jenelle wanted full custody of her son, but Barbara refused to give up Jace.

"If your mother took all three of us kids away, how would you feel?" Jenelle asked her mother in the clip.

"I would feel terrible Jenelle, but you know what, if my mother ever took a child off of me, I would've done everything in my power to get that kid back," Barbara replied.

"And what am I doing? What the hell am I doing right now?" Jenelle responded, pounding her right fist into the palm of her left hand.

"Yeah, six years later," Barbara said, hitting Jenelle with such a low blow that even Dr. Drew had to interject.

"Oh, don't do that," he said to Barbara. "No, no, no, that's not fair."

But Barbara's words hurt Jenelle so much that she responded with her own hurtful comment, then she got up from the couch and walked off stage.

"No, I'm done you guys, I am done," Jenelle told the cameras as they followed her backstage. "You're not forcing me to f--king film!"

Watch the clip below and be sure to catch the "Teen Mom 2" reunion show, airing Wednesday Sept. 30 at 9/8c on MTV.