I 've always feft the best way to keep a secret is to tell no one!!
The best thing to do is stay out of the drama and see what happens...just my thoughts.

You know what as i read this... IF for sure that the husband will find out my advice would be that friend A go to her husband before anyone else does.. but tell her ONLY IF she truely beleives he will find out, because if it is something awful..a husband would hurt worse to find it out that everyone knows except him.. and to add that he wasn't respected or trusted enough to go to, and sometimes thats even worse then the offense.. you know what i mean?  this is only ADVICE, and to make sure it is her descion to tell him, her bad is her bad and her consequences might teach a valuable lesson, that either she becomes a better wife and that she keeps her mouth shut about secrets lol...

and then again.. if you want to stay out of it.. then that is your choice

Im glad i stayed away from the drama.It got to the point of the police being called.The husband really went crazy,Now friend B is telling everyone she didnt mean for it to happen.This is worse then any soap opera and i will call this one As The Subdivison Turns.