Watch 'Teen Mom 2' season 7 premiere: Jenelle Evans has ugly spat with mom over custody

With a new season comes new drama. The cast of MTV's hit reality show "Teen Mom 2" will face several issues in their personal lives in the Season 7 premiere titled "Here we go."

[Spoiler Alert]

The sneak peek videos for episode 1 indicate that Jenelle Evans and her mother, Barbara, are still fighting. This time, they argue about Jenelle's upcoming legal battle.

When Barbara tries to talk to her daughter, she is slapped with an angry response. Jenelle says, "Three things I don't want to talk about. Nathan and custody. You and custody. And then my pending charge....Can you just shut up and let me complete a sentence before you speak your mind?"

Elsewhere, Leah Messer and Corey Simms receive disastrous news about their six-year-old daughter, Aliannah. The former couple meets a neuromuscular specialist since Ali has been falling down five times a day. Much to their disappointment, the doctor suggests that she use a power wheel chair so that she can move easily.

The doctor also recommends Leah to sign her up for Make-A-Wish Foundation. Leah considers it but the doctor informs her that Ali will not be able to enjoy activities for much longer. What will Leah do? Will Miranda Simms be involved in this decision making process? Perhaps this will be depicted when "Teen Mom 2" Season 7 airs.

Season 7 Episode 1's synopsis (via TV Guide) reads:

"In the Season 7 premiere, Nathan threatens Jenelle with felony charges; Leah receives sad news about Ali while waiting on the decision in her custody case; and Kailyn attempts to rebuild her relationship with Jo, but hurts things with Javi."

"Teen Mom 2" Season 7 premieres Monday, March 21 at 10 p.m. on MTV. You can live-stream the episode via MTV's website.