Marriage Diaries is a column by Telegraph Family in which people share snapshots of their relationships and their dilemmas. It is published every Wednesday....

We were on our hotel balcony in Paris when it happened. It should have been a romantic moment. It was our 20th wedding anniversary. We’d splashed out to stay in a five-star hotel in the Left Bank, it was dark and the Eiffel Tower was lit up on the horizon. ...