Your husband is flirting with me, should I tell you?

Relationship Hour

If your spouse is flirting online, would you want to know?
It surprises me that this questions doesn't seem to have an easy Yes/No answer. Well it does for me, but everybody is different. There is no 1-size-fits-all solution. Personally, I would want to know. For me, this is a knowledge is power type of situation where I believe I make better decisions when I have all the relevant information. And a flirting spouse is relevant information, in my opinion.

This week a married man, who is (now 'was') a friend on Facebook began to flirt with me. He used the chat feature to start a conversation about how sexy he thinks I am. I can take a compliment with grace without over reacting but this guy wouldn't let it go. Despite every effort to change the subject he was stubbornly stuck on telling my how sexy I look to him.  I told him I had to get back to work and he said he'd contact me later and really show me flirting.  I un-friended him and blocked him from contacting me in the future. (Click here to learn how to block people on Facebook.)

This takes me to my next question:
Should I tell his wife?
Again, I know I wouldn't want to hear it, but I'd want to know. In a prior relationship my boyfriend cheated on me. Only after I finally broke off with him, did people who knew me tell me they knew he was cheating. I hated not knowing. Had I known I wouldn't have agonized that it was all in my head. I would've left that miserable relationship long ago. I just didn't have any solid proof.  Is it just me who would like to know or would flirty-facebook-guy's wife like to know too? Should I tell her? Why or Why not?