According to Us Weekly, the couple split up after Scott’s cheating forced Sofia’s father, Lionel Richie to intervene.
'Sofia and Scott split up,' a source told the publication, adding 'he cheated on her in Miami and she found out and told Lionel.'
The legendary musician is then reported to have said 'he is going to cut [Sofia] off and write her out of his will if she continues her relationship with Scott as he thinks he’s extremely toxic for her.'
Apparently Sofia – whose sister is Nicole Richie - learned about the Miami cheating incident, 'after their trip to St. Bart’s and it caused huge problems in their relationship' the source explained.
The same source also confirmed 'Scott went to Wyoming because of it and was photographed with another girl and that was the icing on the cake for her to break up with him.'
Following the incident, Disick, who has three children with ex Kourtney Kardashian - son Mason, eight, daughter Penelope, five, and son Reign, three - was spotted in the Midwest a romantic embrace during Kanye West's bash on Thursday, The troubled lothario was also overheard saying he was 'single,' according to TMZ.