Jenelle Evans is running out of second chances, and her mom is running out of patience. Since 2010, the reality star -- who has a 4-year-old son, Jace, and another baby boy on the way -- has been arrested close to a dozen times, including three times in the last year alone.

In this exclusive clip from MTV's new episode of Teen Mom 2, airing Tuesday, March 25, Evans' boyfriend, Nathan Griffith, tells her mom, Barbara, that she's in jail for failing a drug test. (The arrest occurred in August and resulted in a 48-hour stint behind bars.) Not surprisingly, Barbara does not take the news well. 

"I'm gonna tell you, straight on, that this is what happens with Jenelle," she snaps at Griffith. "Because Jenelle can be such a little bitch, right? And she does all these things and jeopardizes everybody. She's jeopardizing your future, she's jeopardizing [Jace's] safety."

It didn't end there. "If I was her, and I wanted custody over my kid, I'd do everything -- I'd work three jobs to prove that I was a fit mother," she continued. "I wouldn't be riding around smoking weed! I'm glad she went to jail, because Jenelle thinks she's above the law."

Watch the clip above, and tune in to Teen Mom 2 on Tuesday, March 25, at 10 p.m. ET on MTV.