Amber Talks Seeing Gary's Girlfriend With Leah: 'It Ruined Everything'

The 24-year-old opens up about life with her daughter -- and her ex's main squeeze.

Amber's former fiancé has been dating another woman for an extended period of time, but it was on tonight's episode of "Teen Mom OG" that the MTV cast member was finally forced to face Gary's partner. The scenario: A and G were dropping their daughter off at school, while girlfriend Kristina was in close proximity taking part in similar parenting responsibilities.

While six-year-old Leah was vocal about Gary's ladies interacting -- even insisting in the car that the two "had to meet" -- Amber resisted and stayed inside the vehicle.

"Gary knew at that time I was getting over him and I was trying my hardest," the 24-year-old explains in the "Teen Mom OG: Featured Moment" clip below. "And when he sees that I'm actually kind of trying to move on, that's when he gets even more into it. And that's when he starts texting and calling."

Understandably, Amber felt "uncomfortable" at the prospect of being in the same environment as Gary and Kristina.

"It was a weird situation," she elaborates. "And then to watch Booboo be so excited about seeing her, I was like 'Wow.' It was a reality check to me that this woman has been in your daughter's life more in the past year than you have.

"I just wanted to bring my daughter to school. I didn't want my daughter to be excited to see another woman -- it just ruined everything."

What else did Amber have to say about the upsetting interaction? Watch the clip, then share your thoughts on how she handled it. And keep up with "TMOG" all season long on Mondays at 10/9c.