I'm a huge fan of Sunstone too, but there is mentioned in the comic that one of Ally's former subs was a crossdresser, even makes an appearance in one of the flashbacks sitting with her at a table in the the club, since stories on other characters have started I wonder if they'll talk about that at some point.
I adore stories involving fetish when there's actual emotional weight behind them, it's why I have the hard cover of Sunstone sitting on my shelf! This is one of those comics! It's adorable, you pull the emotion off well and your style fits the story! I hope you keep going with this!