Khloe Kardashian has thrown in the towel, breaking up with Tristan Thompson after she found out her baby daddy allegedly cheated on her with Kylie Jenner's best friend ... TMZ has learned.
We're told Tristan flew into Los Angeles to spend Valentine's Day Thursday with Khloe and their daughter True. On Saturday night he hit up Delilah nightclub in WeHo, where he snuggled up with Kylie's bff Jordyn Woods.
Witnesses tell us Tristan and Jordyn were all over each other in the club .