Being the other woman

 The scenario is you know, hes married. Your at the bar working as usual, a old highschool friend comes in, your serve him a drink if course and you guys exchange a few words, the basic stuff. But of course you hit him with the "why look so sad whats going on, how can I ease your mind? " He tells you "Well my Wife and I just got into a heated argument, its like every time I come home from work it's always something, I just feel like were losing each other, I mean I love her and all but things havent been the same between us lately and it makes me sad to know I can lose her". Your lost for words and all you can do is say let me get you another round of beers, eventually he gets totally wasted and you being a good friend decide to give him a ride home after work but you realize hes drunk and you always had a crush on this guy since High school and this is your only chance to park along side a dark alley and get FRISKY. So of course you take the opportunity and it works like magic and you send him back home to his wife. & lets just say the SEX was BOMB !  But it doesnt stop there, he left his wallet in your car and you decide to deliever it to him. You show up to his home uninvited and he answers the door and you pull him out side for a bit. You hand him his wallet and ask him of course when he is available for another round of you and it continues from there becauses hes hooked. So my question is to the women who knows ALL OF THIS and still pulls down her underwear is WHY do you enjoy being the other women ?