Teen Mom star Maci Bookout is reportedly back together with her ex-fiance and son's biological father Ryan Edwards.

The on-again, off-again pair, who had a tumultuous relationship during Teen Mom's run and both dated other people for extended periods of time, reconciled in early December, Us Weekly reported in its latest issue.

"He told Maci he still had feelings for her," a source told Us. "They're taking it slow."

Edwards, 24, proposed again to Bookout, 21, via Twitter on December 20, tweeting, "Marry me!"

However, the source claimed Edwards was joking.

The couple ended their engagement in 2010 and have a four-year-old son together named Bentley. Bookout began dating Kyle King some time after Edwards, but the pair called it quits in September.

Teen Mom premiered on MTV in December 2009 after Bookout, Farrah Abraham, Catelynn Lowell, and Amber Portwood had their unexpected pregnancies chronicled on the first season of the network's 16 & Pregnant reality series.

Teen Mom's fourth season, which concluded in late August, was the last for the reality series with its four stars.