The short answer is, based on all the information you've provided, it seems unlikely anything will come of this.
Now, for some more detail. Generally speaking, if there is going to be a criminal investigation and prosecution, it will begin immediately. The reasons are probably obvious; the evidence is at it's freshest right away and it benefits the parties involved to move things forward quickly. You are likely correct in your implying that there may have been CCTV, most clubs have surveillance these days. So, had anything happened, it would have been recorded. You mentioned she detailed injuries, if this were true, and due to actions by you, you likely would have been questioned already.
It would also seem to work in your favor that this woman has a history with your family. If she has had arguments with your mother, and now with you, the implication is that she simply doesn't care for you or your family. That would certainly be taken into consideration in any criminal investigation.
With all these things in mind, it seems improbable that anything will come of this incident.
I hope you found my answer helpful. If so, please click on the green ACCEPT for my answer. This is necessary for me to be paid for my work and so that I can get credit for assisting you. Your question will not close, and you will still have the opportunity to follow-up if needed. Leaving a bonus and positive feedback is not required, but doing so is certainly appreciated! Thank you and good luck!