Leah Messer and Theodore "T.R." dues appear to be going strong months into their whirlwind romance.

Did 'Teen Mom 2' Leah Messer Just Hint At Regaining Custody Of Her Twins?

While the Teen Mom 2 star has yet to publicly announce that she's been dating Dues, her personal trainer, since earlier this year, a new report claims the two are living together as a family with their five total children.

“The girls are very close to T.R.’s boys,” a family insider told Radar Online of Tyshawn, 8, and Angelo, 4, on Wednesday. “They proudly refer to them as ‘brothers’ while talking to family members.”

Will 'Teen Mom 2' Leah Messer's Ex-Husbands Participate In Season Seven?

In addition to Ali and Aleeah's new "brothers," the twins also have a new little sister, baby Remington, their father Corey Simms' new baby with wife Miranda.

“They adore their baby sister,” the source said. “They are really happy they get so much time with her.”

Since Messer lost primary custody of her twins in October, Corey and Miranda have been taking care of the girls during the week, while Messer is restricted to spending time with them only on weekends.

While Messer has remained silent in regard to her relationship with Dues, her second husband, Jeremy Calvert, recently said she was "happy" with her boyfriend on Twitter.

Leah Messer and her family returns to MTV next year for Teen Mom 2 season seven.

Tags: leah messer theodore dues Teen Mom 2 MTV Reality TV Jeremy Calvert