Jenelle Evans didn't make it to a mediation hearing on Monday, in which the Teen Mom 2 star was scheduled to address her current custody situation with ex-fiance Nathan Griffith.

Following a trip to New York City, Evans reportedly fell ill and was unable to catch a flight back to North Carolina in time for her meeting with Griffith. Griffith, on the other hand, was in attendance.

"Nathan went yesterday," his attorney Megan Milliken told Radar Online on Tuesday. "He drove several hours to be at the mediation orientation."

Due to Evans' absense, the hearing has been rescheduled for April 4.

"It's just a lot of butting heads right now," Evans told PEOPLE Magazine of her relationship with Griffith on Sunday. "I think he's really not putting all personal issues aside – he's not making it just about Kaiser. Every time we talk, he doesn't even really ask about Kaiser. He just asks how I'm doing and what I'm up to lately ... I don't think he is sure of his current relationship, or he hasn't let go [of me] yet."

Griffith is currently dating Jessica Henry, and has been since last summer. Meanwhile, Evans has been seeing David Eason since the fall.

"I think [Nathan]'s really jealous of David," Evans explained. "He's claiming I'm letting Kaiser called David 'Dada,' but Kaiser knows David by 'David' – I would never do that to Kaiser and I would never do that to Nathan because that's unfair."

For more of Jenelle Evans and Nathan Griffith, tune into Teen Mom 2 season seven, airing on Monday nights at 10 p.m. on MTV.

Tags: Jenelle Evans Nathan Griffith Teen Mom 2 MTV Reality TV