What is it about year three that sends couples to splitsville? “[It’s] a crucial point where the transition from chemistry to compatibility is tested,” Susan Winter, relationship expert and bestselling author of Breakup Triage: The Cure for Heartache (who has not worked with any of the exes here) exclusively tells Life & Style. “Couples are confronted with the true nature of their [partner,] not the romanticized image they may have fallen for.”