Reviewing the same girl every few days or weeks is not only a bit pointless but can come across as touting. It is far better to just add a post to your existing review saying you've seen her again.
Reviews are meant to be of benefit to other members so 5 reviews by 5 different people are infinitely more valuable than 5 reviews by the same person.
I quite agree Davie and is it not a site rule with a time limit between new reviews?
However if you have returned to see the same girl and the service has improved because you are being rewarded for the repeat business, I do personally find that useful information!
So a new post tacked onto the original review is the best course of action, IMO!
However be aware if you are touting it will soon be seen through by the wise owls of the forum.
That will totally devalue your original review and do much harm to the SP's reputation.