AITA for questioning my marriage after my wife said she'd choose her ex over me?

At dinner with my wife’s family, her ex draped his arm over her chair, and she told me, “If you make me choose between him and you, don’t assume you’ll win.” I asked, “Then why am I still your husband?” She smiled like the argument was over. What she didn’t know was that his estranged wife had just texted me: “You need to see why my marriage ended...” ---------------🌞Sunny Stories🌞--------------- #reddit #stories #redditstories