do you ever think about how much it must've hurt Mary to find out not only is Frank cheating on Beth (who was her friend at one point and who she did warn to be careful leaving him alone) but he cheated on her with someone other than Mary. like can you imagine being so in love with your best friend and repeatedly having to tell yourself "he's married now you can't have him" and then you find out he would just do that. he's not only not interested in you, he's not interested in you