My (now ex) wife and I put off having kids to take care of her mom, who was dying of cancer. We spent a lot of time and energy taking care of her mom. After she died, my wife went through a prolonged period of mourning, and the time just wasn't right. A few years went by and I wanted to tell her I loved her and that I thought it was time to start a family. I found an old 45 RPM record in a store, wrapped it up and gave it to her. When she unwrapped it, she wasn't quite sure how to react. And then she flipped it over and realized what it meant.
I'd wrapped up a copy of You're Having My Baby, by Paul Anka.