"Ask a silly question" ... is what Kristin Cavallari and Jay Cutler are clearly thinking in this video, which proves the writing was on the wall a couple months before they announced their divorce.
TMZ obtained this clip of the now-estranged couple at an event back in February, where they were doing a meet and greet with fans in Chicago at Kristin's Uncommon James store.
At one point, a woman who said she was newly engaged asked for advice about being newlyweds and marriage. Kristin quickly blurted out a very telling answer .