Austrian actress Heidelinde Weis in the German movie "Gabriellas Rache" from 1994
https://www.youtube.com/watch?v=QrIfUXUfO-Y&t=60s
scene starts about 1 min in and you have to copy/follow link to youtube and watch there

by the way: THIS was also her - about 30 years earlier in the movie "Die Tote von Beverly Hills"
(Trailer und low-quality pool scene)
https://www.youtube.com/watch?v=TLfH0cSR-UY (again just directly on youtube available)
https://www.youtube.com/watch?v=lTC0cUZeoss