做贼心虚？

A few weeks ago I got back into contact with a guy I had lost contact with for quite some time. He was the one who msned me asking me who am I cos he finds my name rather familiar but he can't remember where he knew me from and how. After chatting for sometime, he finally remembered how and where he saw me before. It's quite ok to me cos we were not very close friends and it was nice catching up with him about what happened after we lost touch.

However, today I received a msn msg him again asking me who am I. I was actually rather puzzled why is he asking me the same question when both of us were just chatting online the other day. Then I begin to realise that the tone used when asking me who am I was very different from how he talked to me that day. I'm starting to wonder if it's his wife who saw my name on his msn and wants to question me who am I and how we got to know each other. I started asking her who is 'he' and saying that he shouldn't be asking me who am I when he just asked me that a few weeks ago. 'He' just gave me a haste reply saying that 'he' forgot and persisted in me giving him an answer. Fed up, I just told 'him' that I dun think 'he' is who 'he' claims himself to be. After that he just stopped replying... Is this a case of 做贼心虚？