Last week, we reported that Leah Messer and T.R. Dues are living together.

The word spread quickly online, but not because the couple made a formal announcement of their cohabitation.

No, Leah and T.R. broke the news accidentally when they both posted photos of their home Christmas decor – and it happened to be the exact same pic.

Now, insiders are saying the situation has been going on longer than Leah’s fans realized, and if Ms. Messer’s romantic history is any indication, a third wedding may be on the way.

“They were living together earlier this year,” a source tells Us Weekly. “Leah has never been without a man in her life. She usually goes immediately into another relationship after one ends.”

Leah and T.R. began dating back in June and they tried (unsuccessfully) to keep their relationship under wraps.

The couple has been trying harder than ever to keep things on the down-low lately, as Leah recently lost custody of her twin daughters to ex-husband Corey Simms, and she reportedly believes that the judge in her case might look down upon her living with a new man.

Now, friends are wondering what else the Teen Mom trainwreck might be keeping a secret.

Since Leah has never dated a man this long without getting married, the fact that she’s living with T.R. has many expecting a holiday engagement announcement.

But hopefully, she’ll work focus on raising the kids she has before she racks up a third baby daddy.