I have been out many nights in many places with my wife and people have flirted with her and she occasionally flirted back. Not a bother to me at all as flirting can be completely innocent and normal. Yesterday however was a little strange. We had to call down a plumber and I was working in my office and she was dealing with him I could hear the conversation and there was no flirting at all just friendly conversation. Thought nothing of it.
A few hours later the guy texts her and says "It was nice to see you again" He is same plumber her parents use and she had been there during some work. She just replied "yeah"
his response " We really shouldn't be flirting on the phone"
She was just confused. Now as I said I am easy going about flirting but the fact this guy has met me and knew i was in the next room, was in my house and may be needed again as the warranty on our boiler is with his company just really annoyed me. I really feel like ringing him to explain how creepy what he did was. Is it an overreaction or reasonable