Chrissy Teigen and John Legend have been through a lot in their 12 years of marriage — but the singer says the key to their successful relationship is simple. Related: How Chrissy Teigen and John Legend Keep Their Relationship 'Hot' Chrissy Teigen and John Legend know the key to maintaining a healthy relationship. John Legend Shares Key to 'Hot' Chrissy Teigen Sex Life Learning from their mistakes. John Legend revealed how he and his wife, Chrissy Teigen, make the most of their intimate time together at home. “It’s a huge honor,” Legend told Us.