Khloe 'In Complete Denial' Of Tristan's Cheating As 'KUWTK' Clan Braces For Worst

Khloe Kardashian is in "complete denial" that baby daddy Tristan Thompson cheated on her in NYC, RadarOnline.com has exclusively learned.

After shocking video surfaced of Thompson, 27, heading in and out of a hotel with a sexy young Kourtney Kardashian look-alike who happened to be carrying an overnight bag, a family insider said that "Khloe is shutting everyone out right now and doesn't want to listen to anyone."

"She is trying to pretend this isn't happening and keeps saying that she must put the health of her unborn baby girl before these lies."

"When she spoke to her sisters earlier today, she assured them that this was all a big misunderstanding and that Tristan would be able to explain it."

"But with all the recent evidence that has just presented itself, no one knows what to do."

To make matters worse, momager Kris, 62, is in L.A. and sisters Kim, 36, and Kourtney Kardashian, 38, are on vacation in the Caribbean.

"Khloe isn't responding to anyone right now and has gone MIA so they are pretty much set on heading to Cleveland so that they can be there for her when the s**t hits the fan."

"Everyone is just really shocked right now," the insider added.

Meanwhile, several other videos surfaced online where Tristan can be seen clearly making out with his sexy brunette while another woman joins the party and seemingly rubs his face in her breasts.