A source told the publication that Tristan "slides into" girls' private messages on the social media app.
“Tristan slides into girls’ DMs,” a source told Us. “He messages girls that way, on Instagram, and then meets up with them. He likes exotic or non-American-looking girls with big butts.”
The news comes two weeks after it was revealed that the NBA player cheated on Khloé with multiple women whilst she was pregnant with their first child together, True Thompson.
A week after the allegations came to light, the Keeping Up With The Kardashians star gave birth to their daughter.
Khloé is yet to comment on the affair publicly.