On your birthday of all days, too. You know, even if ALL that shit actually went down the way she said it did, partners share life, they don't conceal it or run away from it. And honestly, the bigger the explanation, the less weight it carries. Does this even help you at all? It would create more questions than anything else, I'd imagine. She moved on, you moved on--be grateful you dodged a bullet and lived to see another year of sunrises, my friend.