Leah Messer seems like a nice girl, right?
She's definitely likable, she has her funny moments, she's cute.
And when she pulled her life back together after going to rehab and losing custody of her twins -- well, everybody loves a good success story.
But the thing about Leah is that the girl just can't seem to stay faithful in relationships.
She cheated on Corey Simms twice (that we know of), and the second time led to their divorce. She cheated on Jeremy Calvert, too.
Rumor has it that she also had an affair with Corey while he was married to his second wife, Miranda.
It's a lot of infidelity for one person, right?
But it seems like we may have reason to add another affair to the list after seeing this new Teen Mom 2 sneak peek.
In the clip, Leah is on a FaceTime call with Jeremy, and he tells her that he and his fiancée, Brooke Wehr, broke up.
She's shocked to hear the news -- you can tell by the series of hilarious faces she makes throughout the rest of the clip.
When she asks him what happened, he explains that he "came home to all my sh-t just being everywhere" because Brooke "lost her sh-t."
But why would Brooke be so upset to do something like that?
According to Jeremy, the issue was that Brooke, for whatever reason, decided to go through their phone records. She saw that he'd had a long phone call with Leah and became suspicious.
But as he points out, it was a 35 minute call about their daughter's upcoming enrollment in kindergarten.
To Brooke, however, that excuse didn't cut it.
"Why does she feel that way about me?" Leah asks her former husband, but Jeremy told her he doesn't know.
But the point is that Jeremy is saying Brooke dumped him because she thought he may be cheating on her with Leah, and that is a mighty interesting development.
Partly because Leah, as we said, has been known to cross some lines when it comes to fidelity, and also because Brooke has always said that she dumped Jeremy because of many, many affairs.
He even addresses this in the clip -- he tells Leah that "Brooke just assumes I have sex with all these girls and she called out some of the media, and I don't."
Except he's since admitted that he did sleep with Brooke's best friend, so ...
Leah ends up giving him some good advice -- just stay single for a while, focus on your daughter.
But it's looking like the relationship between Leah and Jeremy will definitely be one to watch for this season.
Check out their conversation in full in the video below: