TMZ reports that 19-year-old Richie dumped her 35-year-old beau after he was photographed getting “handsy” with a mystery woman and Kanye West’s album release party in Wyoming last week.
A source said he was "rarely without a drink in hand and was, at one point, overheard saying he was single."
People have reported that Richie did the dumping, with a source saying Disick's "old issues" to were blame, "When Scott drinks, he is a sloppy mess and fools around."
However an Insider reveals, "Scott seems fine. He even thinks she might change her mind. He isn’t really taking it seriously."
E! also reports that this wasn’t the first time Disick has cheated on Richie, but this was the last straw.
He reportedly "cheated on her in Miami and it caused major problems, but they were technically still together. However, the notorious party boy's latest antics in Jackson Hole were reportedly the final straw."