The reality TV star allegedly told guests he was single and no longer with Sofia, TMZ reported.
"Sofia has moved out of Scott's house", the insider told the magazine.
However after the 35-year-old was pictured cuddling up to a mystery woman earlier this week in Wyoming, at Kanye West's album listening party, it is thought Sofia decided enough was enough. News of their breakup hit just after Disick was caught partying with a young blonde who wasn't Richie.More news: Red Sox to part ways with Hanley Ramirez
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The couple first sparked dating rumours when they were spotted cuddling up aboard a yacht in the south of France during the Cannes Film Festival in May past year. The same source claims that "When Scott drinks, he is a sloppy mess and fools around". Scott's been off the rails recently and isn't in a good place. Lionel was reportedly so angry when Sofia told him that Scott had cheated on her that he told his daughter he would cut her out of his will if she got back together with him.
Friends of the couple revealed that the model had been a positive influence on Disick, whose party lifestyle and drinking also reportedly contributed to his split from Kardashian in 2015.
'Lionel hasn't approved of the relationship since the beginning, ' says the insider.
Sofia performed the routine on camera for her boyfriend Scott Disick. "He isn't really taking it seriously".