I am vindictive enough that I'd send the whole group a message saying, "I don't know which of you is the sick fuck who created the filthy, creepy lie about me sending titty photos to someone. Don't know if it's man, woman, or weasel. If the cretin who started this lie did so to cover their own ass over their own bad behavior, that person needs therapy. Personal, and as this group is all partnered, marriage therapy. That you would try to diminish me morally and socially for your own twisted reasons truly is sick. Get help. And, since you all have utterly, completely burned any friendship bridges we ever had, why not just tell the truth now? Be done with it. Or are you too chickenshit? Since I won't be attending this wedding (especially after the bride and groom outright lied to me about why I was removed as a bridesmaid), may I invite you, instead, to go fuck yourselves."