My wife and I are about 14 years apart. I waited till I was 44 years old to marry. I now realize I was waiting for my wife to get a bit older.
My wife is from China and while she speaks very good english as with most people who speak english as a second language she does not know a lot of idioms. While taking either an ESL lesson or some study on the internet she learned the idiom about robbing the cradle.
So one day she looks at me very serious and says "You robbed my cradle!!" :-)