A: Why on Earth are you friends with these awful people? Mike and Mary are putting on a free tour of Who’s Afraid of Virginia Woolf every night , Mike appears to soberly select drunk women to try to prey upon , you suspect Mary of being willing to get violent over her husband’s suspected infidelities, you yourself have experienced Mike’s advances yet were unwilling to believe another woman when she said he’d tried to hit on her too. You have not mentioned a single redeeming quality in these people that would justify this sort of nightmare carnival.
I think perhaps you should re-evaluate your stance that you and your circle of friends are “not prone to drama,” and while you’re at it, re-evaluate your circle of friends. Whether or not you decide to tell Mary—it’s clear her marriage is in absolute shreds, regardless—ask yourself why keeping silent about unpleasant topics is so much more important to you than honesty, kindness, respecting the boundaries of others, and general good manners. Sort yourself out.