So… What Exactly Is Everyone Congratulating You For, Scott Disick And Sofia Richie???

Well this is... weird??
On Snapchat last night, pics and videos from a Miami restaurant (shown in part above) seemed to show that Scott Disick and Sofia Richie were the center of attention in a "congratulations" celebration and nobody has any idea why the pair are being congratulated...???
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The two were all over each other at the restaurant, and the inscribed message (with poor Sofia's name misspelled) clearly makes it some type