A Miami-based rapper named Stitches claims he had sex and snorted cocaine with Kylie Jenner behind her boyfriend Tyga's back, within the 45 days since her 18th birthday.
Stitches, whose real name is Phillip Katsabanis, boasted to In Touch, "I did cocaine with Kylie and then slept with her -- while she was in a relationship with Tyga.
"I had sex with her: We did it all."
Despite his claims of having sex with Kylie, Stitches took an aggressive stance toward Tyga, saying that if he "has one problem with anything I gotta say about his girl, he can come see me whenever he wants," and "I'll beat the s**t out of him."
He further taunted the "Rack City" rapper, saying that he has "proof" of the encounter, and that Kylie "didn't bring up Tyga, not one time," and "did not seem remorseful -- not one bit."
Stitches said that he met the young socialite through another rapper, InkMonstarr, and the two went on a date soon thereafter, resulting in a drug-fueled sex session.
But things went awry between Stitches and Kylie when she began blocking his calls, inspiring him to compose an insulting rap song and accompanying video called, "Kyga She's a Liar"
Watch the Video on RadarOnline.com (WARNING: Video Contains Profane & Explicit Content)
Stitches told the magazine he "thought it was a good idea to come at her 'cause ... she ignored me after that day we had sex."
In response, Tyga "already had his managers contact my managers and say that if we didn't take the video down it was going to result in violence," Stitches said, vowing it was "like a death wish" for Tyga to mess with him.
"I will stomp him the f--- out," Stitches said.
Stitches had another shocking anecdote in what might be the most uncomfortable revelation made about the tryst with Kylie, who's made clear she's confused about her parent Caitlyn's transition.
"She called me 'Daddy,'" he boasted.
As RadarOnline.com previously reported, Kylie posted a family shot to her Instagram page this past Father's Day, revealing that Caitlyn had told her, "You can still call me dad, Kylie. No matter what I'm always going to be your father. That's never going to change."