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Kristin Cavallari alleged Jay Cutler committed "inappropriate marital conduct" that led to their divorce, according to TMZ.
Cavallari also cited "irreconcilable differences" as a reason for the divorce filing.
She announced her separation from Cutler on Sunday:
"With great sadness, after 10 years together we have come to a loving conclusion to get a divorce. We have nothing but love and respect for one another and are deeply grateful for the years shared, memories made, and the children we are so proud of. This is just the situation of two people growing apart.