Magma film ID

[Jingo]

I wonder if anyone can identify this Magma (I think) film from late 80s/early 90s for me?

A scene has a dark haired girl beside an open air pool, two guys come along, after the fucking they piss on her then pick her up, swing her sideways and throw her into the pool. The scene then cuts to a bedroom in the big house where a lesbian scene is about to begin - one of the girls (a blonde) stands in front of the window for a short while - this is where my VHS copy ran out!!!!

Any help much appreciated.

[Maskmiraklet]

Waterpower Teenies, http://www.egafd.com/films/details.php/id/w0084. The woman thrown in the water is XNK1780. One of the men in that scene is an early Rocco Siffredi.

[Jingo]

Much gratitude

[DJones]

There is also a scene at the same pool with rocco and another guy pissing on two girls. Maybe from another movie?