Is something wrong with me!?!

I found out a few days ago that a girl friend of mine told my husband that I was cheating on him...it surprised me...but strangely I'm not angry with her! To a point I completely understand why she did it, and what may have been going on in her head at the time...but I feel like I should be very angry with her...

I guess if my husband hadn't basically told me that he himself cheated on me too, then I might be angrier, maybe?? I don't know...