One of the most admirable traits of my mother is her inability to speak negative of my father. Even after all that he's done, or more accurately, hasn't done, even after all these years, even after re-marriages, she still speaks of him with tact and respect. Not necessarily because of what he was in her life but because of who he is in our lives. Even when I mention the mistakes he has made, she doesn't falter for a moment, she resists the temptation to speak ill, she holds firm and speaks like a lady. Pure class.
Her unwillingness could be viewed as supression in emotion or strength in resistance, it is debatable. I have encouraged, no, begged, her to release, to express, to finally exhale. She pauses, gives me a half smile, or if we're on the phone, she sighs, but then resumes with "he loves you and your brother, he shows it differently than I do, but he does." If possible, this makes me love her more.