My best friend's wife is a fugly, bitter bitch. No hand-wringing dilemma in this case!
On 2nd thought: I'd drink heavily to prepare for the ordeal, then do her every way, catch the action on camera, and give him the video. And I expect he'd thank me. You see, she's currently suing him for divorce on grounds of infidelity and "going for the jugular."
If she were hottt, I would definitely go for it and definitely not tell him. Nothing beats fucking the wives of your friends behind their backs. It is really hot when you fuck the wife in her own home with the husband in another room and clueless.
I cannot tell a lie. I couldn't do it. He's my best friend for a reason. We may have been through alot of shit together so I couldn't do it. I don't know if I would tell him or not though. I would want to know but not everybody can handle knowing their wife or girlfriend is a C*nt and might do more harm than good. However, if the sides were reversed and he banged my woman I'd pin the tail on his ass and do something that may or may not be considered terrorism LOL.....you asked.