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Newly engaged Kristin Cavallari had a lover's quarrel at STK restaurant in West Hollywood Tuesday night. She and NFL quarterback fiance Jay Cutler left the restaurant separately, both looking forlorn.

Cavallari, 24, and Cutler, 28, got engaged at the end of April during a trip to Cabo. The two have only been dating since the fall ... hopefully they didn't rush into things!

When asked how things were going, Cavallari replied with a curt, "Fine." Then, she and Cutler had a tense conversation, and Cavallari walked away. See it all in our video.



Cavallari recently dished on their wedding details -- see what she wants after the jump!