A photographer must pay attention to everything, including minute details.
The ring, the bracelet, the tattoo, and the top of her bikini (see the brown strings) are all out of place, distraction. Anything that does not lend to the composition, needs to be removed. For the first picture, the ring and bracelet must go.
Let's add the earrings and the belly piercing to the must go list from the 2nd picture. Why pose the model the way she is standing? Very unflattering. Btw, the pose, together with that pair of ugly footwear, made her legs look short.
In the third picture, pay attention to details. Even though it can look sexy by pulling the top down the way the model did, but showing the top of a white bra with red flowers is a major snafu. Pay attention to details!
This is really not a very good series.