Golfing

Craig and Richard are out trying to get in a quick eighteen holes, but there are two terrible lady golfers in front of them hitting the ball everywhere but where it's supposed to go.
Craig says, "Why don't you go over and ask if we play through?"
Richard gets about halfway there and comes back.
Craig asks, "What's wrong?"
He says, "One of them is my wife, and the other one is my mistress."
Craig says, "That could be a problem. I'll go over."
He gets about halfway there and comes back.
Richard says, "What's wrong?"
Craig replies, "Small world."