Carolyn Hax: Would-be grandpa scoffs at couple’s reason not to have kids

Adapted from an online discussion.

Dear Carolyn: For years, my oldest son and his girlfriend said they would never get married; she was against it. Then, five years ago, she relented and they got married, by all accounts happily.

They are financially secure: well-paying jobs, no debt on their advanced degrees, a rental property they own outright, a manageable mortgage on their home, late-model cars.