Tensions were at an all-time high between Kim and her family versus Tristan after word got out that he cheated on Khloe prior to her giving birth to True back in April.
It only got worse when they were all in the delivery room together. Kim, who was admittedly furious with Tristan over his infidelity, was seen making faces and expressions behind his back on the most recent KUWTK episode.
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Perhaps Tristan felt what was going on behind her, because she discovered that he blocked her on Instagram shortly after!
"What a f***ing loser!", Kim screamed after discovering that she couldn't access his IG profile. She then called Khloe about the social media incident and said simply, "It's on." It all goes down on the latest episode airing Sunday night on E!