An old colleague of mine, retired now.
Once told me about a colleague of his, who was on call.
His wife took a call from an Engineer who explained that "He" needed to ask the Engineers opinion on a problem.
As He was not available.
"What's wrong?" ask the wife when told she replied "It sounds like the expansion Valve to me!"
She apparently was spot on and Had, been listening to Her husband on occasions.

Another of my friends has a lovely Partner, Who after any extended call outs.
Cuts any conversation short by just asking "Did you Fix it Dear?" Followed by "Ah! Good!"

Mine on the other hand will Say. "Think of the overtime!"
Which of course means. "I have spent it before you have earned it!"
Grizzly