Your idea of us being brothers is doable. Unless one of the other men prefers it I volunteer to be the eldest of the three. I'd also like to portray him as a bit rebellious as to becoming her slave. what if prior to this he was experimenting with being a dom and was starting to find it to his liking. And then something happened and he was sold as a sex slave. Now he must give up his dom tendencies in order to please her, something he doesn't really want to do at first, but over time will come to enjoy. Or perhaps she secretly enjoys being submission on occasion and allows him to take control over her - to a certain extent. I'm not sure how that would work with there being four of us, but perhaps on occasion he could be the one telling his brothers how to please their mistress.<br/><br/>Other than that I don't have a whole lot of other ideas at the moment.<br/><br/>As for looks I'm thinking he is about 5'9"/180 lbs. medium  length light brown hair, blue eyes. Average body type. He'd be Caucasian obviously.