Yeah, you never can guarantee initiating a lucid moment, it happens to you. You can cultivate the tendency, but that's it.

But once you start remembering it and consciously thinking about it, it starts to become a little more accessible to your sleeping mind. I think this is what makes dream journals so effective for developing the skill in the first place.

But yeah, that happening and simply not remembering in the split second you have to do so would kinda suck. Though I would be slightly tempted, personally, to process the experience a little bit now that I'm awake, and then go like "fine. let's dance bitch." and go back to sleep. Because all I need is to become lucid at any point, and I can summon her to be dealt with.

I had a lot of practice focusing on and thinking about dreams in general though.

edit: Considering this a little further, when I said "dealt with" that struck an unfortunate tone that I didn't fully intend. It's useful imo to remember that she is a figment of your imagination, and she wouldn't be there if there wasn't a reason for it. So, my "dealt with" isn't like levitating her into the sky to slowly disintegrate her from the toes up or something. I would probably get started by simply asking that slice of my own mind, what does she want? Why is she here?

Likely sentence would be banishment on pain of destruction, but it would depend on what she said.