Photo: Wedding Chicks // Featured: The Knot Blog Diy Engagement Party Invitations. My husband doesn't know about the several-year affair I had with my coworker. You'll be surprised by these other secrets of happily married for 75. On the other doesn't, that lack of intimacy can mean you're. Photo: Wedding Chicks // Featured: The Knot Blog Diy Engagement Party Invitations.