Here's a sketch I wrote recently.
INT. AIRPLANE GATE WAITING AREA
A HUSBAND & WIFE are seated in a waiting area, next to a MALE COUPLE with a baby. The Wife notices the baby and whispers to her husband.
Ooh, look at that little sweet pea!
With any luck, we’ll have our own baby soon!
You know, I’m ovulating right now!
Really? Should we go try?
(He indicates to the bathroom.)