DEAR HARRIETTE: I just found out that my mother made a pass at my ex-boyfriend. I always suspected this because I noticed the subtle flirting when he would come around. It has always frustrated me how flirty she is with younger guys in general, but I am furious that she actually made a move on my ex. Now that he has confirmed that she did make a pass at him, should I confront her? If so, how? This…