Back in the day, Kailyn Lowry used to date Jo Rivera -- you probably know that though, since their union brought about precious little Isaac, the kid that she had after being 16 and Pregnant.
He made her a Teen Mom, so it's kind of a big deal.
But their relationship wasn't perfect, obviously, and they broke up and got back together a few times.
In this emotional sneak peek from the Kailyn's Biggest Blow-Ups special, we see her watching the footage from their final breakup.
Warning: it's pretty rough.