Somber surrender: the act of giving into a dark desire. I can't quite imagine why you called it "Captivity" because the model is graciously (yet against her will*) surrendering herself to the power that is obviously dark. Not sure… but that's my take. You should have called the piece: "Dark Surrender!" You look beautiful as always. Your outfit looks really soft and it reinforces my notion that you are giving in - especially doubled with the subtle gesture of your palms towards the viewer suggesting non-aggresion.
* your facial expression says "no" but your body language says "yes"
Oh, BUT WAIT! Maybe I am looking at this the wrong way around - If you are about to be captured, then YES, definitely your title is 100% accurate to the photograph. You are surrendering into captivity! WOW. I am intrigued!