Hi, Deadman and all.
You could have her wear a one piece thong type swimsuit using that for the top, and a pair of shorts or skirt for the bottom. The type of swimsuit I’m talking about is the type where instead of going around the waist, the bottom of the suit has straps that go over the shoulder and provide a hint or so of modesty around the front of the breasts. This top is not only sexy to look at, but can be very sexy to remove, with the wearer’s permission of course. “She nodded at him nervously in consent, nibbling just a bit at her lower lip. He unfastened her skirt, allowing it to fall to the floor. He placed his hands gently on her shoulders, and brushed the straps off of them. The straps of her swimsuit fell to her feet, leaving her very nude and starting to glisten between the legs.”
You can also search for “sexy top” on your search engine of choice, and pick the one that suits your fancy for the character.
Cheers!