Rumors accusing “Teen Mom 2” star Leah Calvert of drug use and infidelity have cast a dark cloud over the MTV series’ new season. According to a report from The Ashley’s Reality Roundup, the reality-TV star’s recent issues have halted the hit program’s production for Season 6. While her co-stars, Kailyn Lowry, Janelle Evans and Chelsea Houska, and their better halves have already signed on to return for the next installment, Leah, 22, and her husband, Jeremy Calvert, have not.

According to The Ashley's Reality Roundup, MTV producers are aware of Leah’s alleged drug use and rumors that she cheated on Jeremy with her ex-boyfriend Robbie Kidd. Despite reports that Leah has been “getting high for years,” and has spent thousands of dollars on painkillers such as Vicodin and Oxycodone, the network has no plans to get the mother of twins Ali and Aleeah, 4, and Adalyn Faith, 20 months, into treatment. While there are no official plans to get the “Teen Mom 2” star professional help, some of her co-stars are rumored to be considering staging an intervention.

“Many of the people that work with Leah on the show are very worried about her,” said the site.

While Leah’s fate on the program may be up in the air, the Ashley is reporting that Jeremy, 25, has already decided to quit. His decision comes less than a week after he accused Leah of being a “slut” on Twitter following hearsay that she had recently cheated with Kidd while attending a relative’s funeral outside their home state of West Virginia. Leah’s sister Victoria has since denied allegations the couple might be headed for a divorce.

“They’re trying to work it out, just like any other married couple,” Victoria told told the podcast “4 S---s and Giggles” Saturday. “I talked to Jeremy last night and he told me, ‘I love Leah and I love the kids. I did post stuff on Twitter but I was upset.”

Leah has reportedly yet to return her Season 6 contract to MTV. It is unknown if Leah’s ex-husband Corey Simms, the father to her twins, will return to the show.

The finale episode of “Teen Mom 2” Season 5 aired last Wednesday. The original cast of MTV’s “16 and Pregnant” spinoff, “Teen Mom,” starring Maci Bookout, Catelynn Lowell and Amber Portwood, is expected to return to airwaves for Season 5 in 2015. Former star-turned-porn star Farrah Abraham will not be returning to the program.