There might be another custody battle for Leah Messer, pictured in a promo shot for MTV's "Teen Mom 2" Season 6, on the horizon. MTV/Viacom

Leah Messer may have another custody battle in her future. Following reports that Leah, 23, lost primary custody of her 5-year-old twin daughters to ex-husband Corey Simms earlier this month, rumors are swirling that the MTV star may have to fight for custody of her 2-year-old daughter Adalynn.

The Ashley’s Reality Roundup reports that Adalynn’s father, Jeremy Calvert, is “indeed going to try to get primary custody of Addie.” According to In Touch Weekly, Adalynn was recently found by a police officer after wandering unattended outside Leah's home. While the Ashley reports that Leah’s failure to keep an eye on their daughter is definitely one of Jeremy’s reasons to fight for custody, it’s not the only one. “This was something he wanted long before the Addie incident,” reports the site. “But it surely lit a fire under him to get to work on it.”

Following Leah and Jeremy’s divorce in June, reports suggested that Jeremy was given visitation rights of Adalynn. Their custody situation appeared to be configured based on Jeremy’s job as pipeline engineer, which fans of “Teen Mom 2” will remember kept him away from home for weeks at a time. In order to get custody of Adalynn, sources say Jeremy would consider a career change.

“Jeremy is willing to change jobs, if necessary, to get custody of Addie,” reports the Ashley.

Leah is said to have lost custody of twins Ali and Aleeah during a court hearing Oct. 13. In Touch Weekly reported that Corey was awarded primary custody “effective immediately” after the twins’ school records showed they had been late. Leah, who has been battling Corey for custody of the twins since September 2014, now has her daughters on the weekends, a family insider told the magazine.

While Leah has not commented on her custody situation, she did reveal on Twitter Saturday that she was spending the weekend with her daughters.

“Teen Mom 2” Season 6 concluded earlier this month. The docuseries is expected to return for Season 7 in 2016, though MTV has yet to make an official announcement. It’s unknown if Corey and Jeremy, who have long been rumored to want to part ways with the show, will return.