The peace was nice while it lasted, right? When Jenelle first introduced her new boyfriend, Nathan, to her mother, Barbara, a look of relief washed over Barb's normally stern face. In fact, she almost seemed charmed by her daughter's latest suitor. (Was it a hallucination, or had we caught a pig coasting through the clouds?) Finally, a guy who came to the door, looked her in the eye and appeared to be sober. However, on tonight's episode of "Teen Mom 2," the honeymoon period for Nathan and Barbara officially came to a close, when Barbara insinuated that Nathan was a freeloader and Nathan retaliated with an even lower blow, accusing her of getting Jenelle hooked on heroin.

In the "Teen Mom 2 Featured Moment" clip below, Nathan elaborates on his claim, still standing by it even though he and Barbara are in a much better place these days. But Jenelle says it's not so cut and dry. While the recovering addict, currently pregnant with her second child, agrees that her mother's "negativity" contributed to her drug habit, she acknowledges that Barb was truly there for her at her weakest moment.

"She did bust in my house when I was with Kieffer, and she was like, 'What are you doing?'" Jenelle recalls. "She was like, 'You're ruining your life.'"

Check out the video to hear Nathan and Jenelle discuss Barbara's effect on Jenelle's past choices, and weigh in on whether you think Barb contributed to her daughter's substance abuse.

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