All I wanted was advice on what to say to my wife about what happened last nite
That's what you say as an opening line, but that's not where you went and that's not where your emotion and frustration comes from. Go back and read this thread and all your comments. I do not believe you want simple advice on what to say to your W. If that were so, just tell her the simple lines you first stated. They are good enough for someone who doesn't care. There is no point is even worrying over how they might sound to her.
I think you want your W to love you as she once did, but you want us to justify to you why you should keep your distance from her to protect yourself. I think you are in denial of your true feelings. I can fully understand that and empathize with you, but I won't support you in it.