Scott Disick looks like he's been exerting every effort to win back Kourtney Kardashian. He just got out of rehab last month and was even seen multiple times with his ex. Now that multiple sources claim that the mother of his children is hooking up with Justin Bieber, how is he taking it?

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Hollywood Life talked to a source close to Disick who said, "Scott is trying to get better, trying to turn a new leaf and now Kourtney is going out late night and hooking up with another bad boy in Justin," the source revealed. "So, Scott feels like it is a slap to the face. He feels that he is doing what she wants and she is now doing things just to make him feel bad."

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Lord Disick has also been reportedly shopping his pain away. As to whether he sees this as revenge served cold, the source goes on to say, "Scott is thinking of retaliation and may join her in hurting each other and he now has a complete different outlook on how he is going to treat that night."

Tags: Justin Bieber scott disick kourtney kardashian