We're told Kourtney is livid over these pics, showing a bevy of chicks making their way in and out of his house, including one wearing his bathrobe. She thinks he's rubbing her nose in the breakup.
But our sources say Kourtney is especially upset because Scott threw the party hours after she allowed him back in the family house to visit with their 3 kids.
Kourtney gave Scott run of the house Wednesday when she was at the ESPYs. She figured it was a way they might create some sort of civilized relationship for the benefit of the kids.
The party put an end to peace talks.