Grace Montgomery on Instagram: "I don’t even know where to start... How can I even begin to explain this to my children? The man they call “dad.” The man who tucked them in at night. The man they trusted with their whole hearts... is the same man who’s been betraying our family. I found the proof. The late-night “business trips.” The messages filled with words he never spoke to me anymore. The photos of him with another woman when he was supposed to be at work. He didn’t just cheat on me. He che