Dear Prudence, Back when my husband and I were dating, I cheated on him (there were extenuating circumstances, but I still greatly regret it). We’ve now been married a number of years. I thought we had worked through things more or less, though I’ve never been certain he completely trusts me. Recently, he brought up the fact that he’d like to open our marriage. I’m clear I don’t want this—if nothing else, the toxic stew of jealousy and hurt around the cheating episode convinced me. When I said I wasn’t comfortable with an open relationship, he told me I was a hypocrite and have no legitimate objection because of the cheating episode. I feel rotten about the pain I caused my husband but don’t want to be bullied into polyamory or constantly punished for something that happened in the past. Is it time to walk away?