While the footage is yet to be confirmed as legit, as neither the family or Tristan have released a statement, many media outlets are reporting that the Kardashians have pretty much labelled the "cheating" allegations as truth, after "unfollowing" the National Basketball Association star.
Khloe only wants her family around her when she gives birth.
Tristan was seen getting cosy with a pretty brunette at PH-D Lounge, a rooftop bar in Manhattan, over the weekend.
A source said: "Kris has gathered the family and made sure they would all be there for her".
Tristan plays for the Cavaliers and was not in the starting lineup for the game (meaning he wasn't playing from the get-go), but when he was brought off the bench to replace LeBron James, he was heavily booed by fans.
The woman who captured the footage said: "I was there and he was on the table right next to us with a group of friends and some girl who he was obviously making out with all night".
However, the Kardashian and Jenner family are very fond of the basketball star and hope it was all just a big misunderstanding. Everybody knew who he was.
One fan even attended the game with a "We heart Khloe" sign, proudly holding it up for all to see, although Tristan apparently looked "unphased" by the claims against him. Sending all the positivity for you and her, also don't let Tristan make this magical time of your life, that we know you've always waited for, the worst. I love the Kardashians and I think it's devastating. In this photo, the reality star celebrates the launch of Good American with Emma Grede at Bloomingdale's on October 28, 2017 in New York City.
LANI Blair has been identified as the woman seen to be "kissing" Tristan Thompson in new video footage. They were later seen walking towards his hotel.
According to TMZ.com, Tristan avoided what would have likely been one of the most awkward moments of the night by joining the game near the end of the first quarter - meaning he was able to take to the court without the PA announcing his name.