Your two sisters have a friendly bet on if BBC or BWC is best. They offer their freeuse bodies at the beach. Your role is the keep score without getting hard.
“Hope you’re enjoying your cage babe, I got one even smaller than your actual size so you could actually feel it on your tiny cock. Your friends are coming over now to fuck me, don’t be mad if we leave you here to fuck elsewhere <3”
“Thanks for agreeing, I’ve always wanted to be fucked by all your friends in public while you watch me! Of course you can’t touch yourself though because we’ll tie you to a rock.”