TL/Typeset by me. If you see something I've screwed up, please tell me how to fix it. I'm under no illusions about my skills.
I'm not too sure on the last line. She says "一刻も早く…一度…ソレイユへ戻らないと" which I believe literally goes something like "Immediately… for one instance… to SOLEIL I must return". She could be saying that she must go back to the flagship SOLEIL, or perhaps that she has to return to the role of Soleil, or to return something unspecified to something named SOLEIL. I tried to pick an English version that (if you read it generously) maintains some of that ambiguity.
So am I understanding correctly that Dianna is not a virgin for some reason? Also I wonder where in the series this is supposed to take place.. Their relationship grows a fair bit the farther along the series goes so..