Re: Let's look at the other side...
Married men or married women anyone who have an affair should be condemned and be left by their spouses immediately.
I told my husband when I was engaged to him that if you ever dare to go after any other woman I'll not think for a minute before leaving you ! I told him that I will never ever come after you , or follow you or that woman , nor will I bother to know about that woman or see her. I just know one thing I cannot stand a man who has such low morals and who is so out of control that he actually goes out and betrays his wife and have an affair with other woman ...Yuck ! I will never stand such a man . I have had and can put up with other things but never with this.
In my view women who have affair with married man can have any of the following reasons:
Lust
May not be able to get married and dont mind being a 2nd wife to anyone.
Financial support
The sense of satisfaction of getting hold on someone elses husband
Are at a age where they cannot get a boyfriend who is single and they are afraid of committment so they time pass with married man.
There can be any reason on this earth. But I firmly believe what goes around comes around man and woman who involve in extra marital affairs does not deserve sincerety and love of their spouses and sooner or later it hits them back hard.
From Islamic perspective too this act is severly punishable.
May ALLAH give everyone guidance and show proper path.