Amber Portwood called off her wedding to Matt Baier after he was busted giving Catelynn Lowell pills on Teen Mom OG. Lowell turned to Twitter to tell all on the drug scandal that's rocking the franchise.

On Monday night's episode, Portwood, 27, became upset with her fiancé when he provided Lowell, 25, Xanax for her anxiety since he's supposed to be clean.

But Lowell admitted that she never took the drugs supplied to her!

"FYI I never took what Matt gave me," Lowell tweeted. "Like I know what it is?! Hell no."

She added, "I saved that s**t and told Amber I wanted proof."

Baier explained to Lowell of having pills on him on the episode, "What happened was my buddy gave me Xanax in case Amber needed it on the plane. That was it. She thinks, 'You're back on drugs.' I'm like, 'I'm not, I swear to God.' I even said to Amber, 'If I wanted it, why would it have been in my pocket? It would have been in my stomach."

He then told a producer that he was only trying to "help" Lowell and didn't deserve the way Portwood was treating him.

"Now there's rumors, everybody's talking about how Matt was f****d up yesterday and that he's back on drugs," he said. "She wakes me up this morning, 'We're not getting married. You're a f*****g junkie.' I'm done with this."

Lowell has been caught on camera smoking marijuana in the past. She entered rehab last season for anxiety and depression.

As Breaking Celebrity News reported, Portwood broke off their engagement again in May after sources revealed that he failed a lie detector test about cheating on Portwood.

Although an insider told Breaking Celebrity News that the reality stars are "still living together" and that she has "not made any final decisions just yet," she revealed over Instagram live that they are not together.

But there is still hope for the controversial couple, as Breaking Celebrity News exclusively reported that the duo will appear on the WE tv series Marriage Boot Camp Reality Stars.