Mistaking The Missus For The Mistress
(A waitress friend of mine has a couple who regularly comes in and jokes a lot together. One day, the man comes in with a different woman. This occurs as she’s getting ready to give them their check.)
Waitress: “You come back soon!”
Male customer: “I will.”
Waitress: *joking* “Oh, and you better be careful or I’ll have to tell your wife you were here with another woman.”
Female customer: “I am his wife. Who has he been here with?”
Waitress: “…I’ll take care of your check now.”