If it's been a while since your initial review and something has changed about her services or manner or looks, you should just update the old review.

Updating an old review to match your sessions nowadays doesn't seem appropriate.  Unless you have a time machine and can actually change what really happened, that amounts to giving false information about what she was like at the time.

I'd say it isn't necessary to do a review for every single time you see her though.  Maybe just if her appearance or performance significantly change (up or down).

You can submit a second one but it will replace the original.  It can be useful if something was notably different (for better or worse) about the later session.

if the next sessions are better and a more current description of her servies and appointment..yes. If not leave the review alone