Jenelle Evans appears to have admitted to drug use.
"I hate you kieffer!!!! why cant you leave my life alone and stay away from me..you got me strung out on heroin #BYE," the Teen Mom 2 star wrote to her ex-boyfriend Kieffer Delp on Twitter.
The rather revealing tweet on Wednesday comes on the heels of Evans' recent stint in rehab.
At the time, however, Evans' other ex Gary Head insisted that "Jenelle does not do drugs."
Meanwhile, a source close to Evans tells E! News exclusively that the reality star "is a heroin addict."
What's more, the source added that Evans "told one of her castmates she never had a cyst and that's what she made up for when she went into the hospital for heroin the first time" last September.
E! News has also exclusively learned that the Teen Mom cast will find out in two weeks whether the show will continue.
—Reporting by Katie Rhames