Considering that currently ALL female companions are romance options for males...I doubt they'd ever deny them one.
That isn't quite true. LS Jasea is not available to either gender as a romantic interest. Which I believe may well be corrected in the future (I seem to remember reading something about that somewhere, but don't ask me where).
I just hope lvl 50s can do them.
I've decided to go through the dialogues with Jaesa as they occur, since she's not actually a LI with anyone yet. So, hopefully, that means if they do open her up as a LI, there'll be mechanisms in place for capped SWs to go back and romance her.