Oh boy — Teen Mom OG star Amber Portwood may want to cover her ears for this one!

A woman named Tiffany Basset is spilling the tea regarding her alleged fling with Matt Baier — and it allegedly took place while he’s been romantically involved with the mother-of-one.

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“Matt contacted me about investing in a new shop, and was interested in telling my story in the process,” the tattoo artist explained to All About the Tea. “I was excited to possibly land a celebrity client, as well as a new business venture.”

Tiffany, who the outlet points out is in remission after battling cancer, said they connected in November 2016 and were ready to become business partners — before things took a romantic turn.

“Matt began sending me provocative text messages, including a d–k pic. I went along with it, hoping that it would eventually pay off for my business. My motive was always business and providing for my three children,” she explained.

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The two allegedly met up in Vegas — with Amber, her brother Shawn Portwood, and Matt’s friend Jeff [who Matt allegedly thought Tiffany would hit it off with — my, how the tables have turned] in tow — and proceeded to hook up twice. One time Tiff says was willingly and for around 45 seconds (LOL), while the second time was a little more questionable.

“Two o’clock in the morning, Matt comes into my room, supposedly to pick up some souvenirs left on the table. He just wakes me up and decides that we’re going to have sex. No warning — no nothing. I’m like shaking, I froze — I didn’t do anything to stop it,” she told the publication.

He even told Tiff that he loved her on Christmas, according to a text exchange. She took the interview opportunity to apologize for all wrongdoing on her part.

When she flew in to film MTV’s Being Matt special, she told producer Kiki Malone she was “taken advantage of” by Matt. They eventually wound up dissolving their business partnership.

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It sounds like Vegas may not be the place for Matt and Amber, especially after that whole wedding fiasco.

Scroll through the gallery to relive Matt and Amber’s relationship timeline!