Shattered

I found out the other night my best friend  is cheating on her spouse. I ran into her in a pub with the man she is cheating with, doing things that were more than just having a drink. I’m shattered. Why? Because we’ve known each other for some long time and I thought I really did ‘know’ her. I also thought she was better than this – that she had good character and loved her spouse.. they seem happy enough when I see them together in our various circles of friends gatherings. She didn’t even seem embarrassed by me finding her with this other man – that’s the rub. In fact, she told me later that it doesn’t mean anything, its only sex when her husband is away for a few days and she gets lonely. God doesn’t she realize what fire she’s playing with? She’s got 2 kids -its always everyone else that gets hurt when the proverbial shit hits the fan. And what the fuck am I supposed to do now when I see her and smiling husband together at our next mutual friend gathering? I’m not saying a word of course, not my business.. but how am I gonna look him in the face knowing what she does behind his back? and no.. they dont have a ‘open’ relationship. Needless to say this has greatly affected our friendship at this point too.