Christina on the boat

Here's my 2 cents worth:

1. I would gel the flash to match the ambient. You have this lovely warm yellow rim light coming from the rear and the flash light way cooler by comparison.

2. I would dial down the flash a tad as it's a little too strong causing hard shadows (look at her tummy where her arm is resting) and I would use a slower shutter speed (or higher ISO) to bring up the ambient to better balance with the flash.

That said, I like this one a lot. She's a very shapely model and of all the series, I think this is one of my faves. Well done.