Scott Disick and Sofia Richie’s Relationship Is 'Starting to Fizzle,' Source Says

The spark between Scott Disick and Sofia Richie may be burning out.
“Scott and Sofia’s relationship is starting to fizzle,” a source tells PEOPLE. “They’re starting to argue more, and it’s bothering Sofia.”
“She thought he would be more serious about their relationship and is finding herself to be more frustrated with him as time goes on,” the source continues. “Everything everyone has been telling her to look out for, she’s