Not allowed to swim half naked or fully naked in a public pool, and suitable attire must be worn -no singlet tops?
So Vicky wears her work clothes in the pool with her shirt open as a makeshift swimsuit.
Yes she may attract some attention, she likes it and the free movement.
So far she hasn't broken any rules. Just chilling in the pool.
If they don't like boobs or say only guys can wear singlet tops, you may as well just say 'No girls allowed'.
I drew this to get get the wet hair, the ears illustrate it. I want to finish this asap.

Vicky is a little nervous swimming fully clothed, either 1/2 naked or full naked or in her pink swimsuit, the aim was to dive in before you think about it.
Other makeshift swimsuit: Skirt only, boys swim in shorts only, so Vicky swims in her skirt (it hides her privates), she will still attract attention