Maybe it's because I never bore children, but this opening paragraph strains the hell out of my credulity.
They're exercising their children and right away talking about sex with their husbands? Come on...
She is right that a good marriage is a good example for the children, but she's hardly the first to experience that blinding flash of the obvious.
I had two sets of grandparents that reached their 50th wedding anniversaries (one pair made it to their 60th). My mom and dad are going to celebrate their 50th in three years. I didn't need Ayelet to hand me the key to a lasting marriage. :D