If you want to, as “MarkSutter” so eloquently put it, “go get that pussy,” then I think that would be fine, so long as:
• You are honest and upfront about your intentions regarding any kind of commitment (or lack thereof);
• You don’t intentionally harm her emotionally by just deviously and cruelly leading her on, using her, and then throwing her away;
• You are very stringent and meticulous about using proper and effective protection (ideally, both for yourself and herself, as combinations of protection are safer – an unwanted child is much more than a simple little whoopsie daisy!).
If she is okay with all of the above, then, well, who is any of us to judge? I mean, people have their little fling all the time, of all ages. It’s okay, as long as you both are aware of whatever strings are to be attached, or not to be attached. Oh, and make sure you both are very careful not to get caught, because, as you already know, things get rather nasty in JW land when the elders (WT police) find out about any kind of naughty naughty.