This is what it looks like right now, although things could change. Sarah doesn't want to "walk down the aisle" like a new bride. She says that would feel silly to her. So, probably the three of us, Sarah, myself and Aaron will be seated in the front row, with Sarah in the middle. Bill, the owner of the property and the guy we've gotten to know very well over the years through his BDSM parties, will "officiate." We're thinking of wearing loose-fitting white linen clothing, with nothing underneath. Guests will be encouraged to dress similarly.
After Sarah and I say our vows and I commit to her sexual freedom and sexual expression, I'll invite Aaron into our marriage (not as a co-husband but as her lover) and I'll invite him to join us and place Sarah's hand in his. This next part is somewhat undefined right now, but as I acknowledge his alpha sexual role, I'll disrobe and stand in front of everyone naked and in my chastity cage as a visual symbol. At some point, Aaron will give Sarah a ring and the two of them will exchange vows and they will attach a "cuckold" ring to my cage. Details are still evolving.
When we're finished, there will be a party with food and drink and socializing. After a while, the guests will be invited to join Sarah, Aaron and me in a playroom where they can watch the "consummation" of Aaron's role as he and Sarah have sex. I will be the sub and participate, maybe underneath Sarah and licking her as he fucks her. When they finish, I'll do clean up, the ultimate symbol of our sexual roles. From there, who knows. We hope the guests get naked and start having sex together. I know some of the men there will want to fuck Sarah and Aaron wants to have sex with some of the women, as well. This part is not going to be "choreographed" and hopefully it will turn into a nice orgy and celebration of sex.
Our boys will be going with my parents to North Carolina for much of the summer, as they have done for several years. That's our "window" for the ceremony, probably sometime in early August. We've tossed around several ideas for a honeymoon. I want Sarah and Aaron to have time alone. They have not really had an extended vacation with just the two of them. We're thinking they will go off for a week by themselves and I'll join them after that.