Mark Estes Breaks Silence on Kristin Cavallari Split E! NEWSKristin Cavallari and Ex-Boyfriend Mark Estes: What Went Wrong? Us WeeklyKristin Cavallari ended Mark Estes relationship due to 13-year age gap Fox NewsWhat Kristin Cavallari and More Have Said About Relationship Age Gaps Yahoo EntertainmentKristin Cavallari splits with 24-year-old boyfriend Mark Estes after 7 months USA TODAY