I've heard that before with the punchline "I know, but she's good with the kids"A policeman knocked my door earlier.
When I opened the door he showed me a photo and asked if it was my wife.
I said "Yes, it is".
He said "Im sorry to say it looks like she's been hit by a bus".
I said "Thats a bit harsh".
Or, Tommy Cooper:I've heard that before with the punchline "I know, but she's good with the kids"