Female led relationships discussion

Within a few months’ time, we’ll be celebrating the first year of our journey into the D/s femdom cuckold lifestyle. I’m looking for ideas to make this occasion feel truly special and would love your suggestions on how best to do it. Please keep in mind that this marks our lifestyle anniversary, not our actual wedding day. Here is some background… We have been married for more than 20 years (living a vanilla life until roughly a year ago). The children are largely independent now (they return home from college during weekends and holidays). Before we started this new path, she was very conventional (we did swing occasionally, though it wasn’t common and she often felt guilty afterward). Now, she has really embraced the domination and humiliation sides of cuckolding and can be quite sadistic when BDSM activities are involved. Our “official” start in the lifestyle happened at a major BDSM event that we plan to attend again this year. Even though I am her submissive husband, I don’t wear an official collar in the strict BDSM sense. A formal collaring ceremony is possible since she wants to organize it herself and simply lacks the time before our next big event. I welcome any suggestions; I really want to make something special for such a remarkable woman who has grown so much over the past year.