What’s the possible relationship between the two speakers?

W: Let me help you to some more fish.
M: The fish is delicious. But I’ve had enough now. I’d like to have some soup.
W: Here it is. Help yourself.
M: Thanks. I didn’t know you were so good at cooking. If my wife were here, she would be surprised as I am.
W: Well, bring your wife too if you come here next time. I haven’t seen her for quite some time.
M: Sure, I will. My wife will be very happy to see you, too. Well, I’m full now. Thank you for your wonderful meal.
W: I’m glad you enjoyed it.