Well....I've thought about that too!

From what I can gather.....you are in the pool and you act like you don't see her watching......right? If so......and since this has happened a few times with no obvious offense on her part......you'll have to let her know that you know she is watching. Next time........just look up to the sillouette in the window and hold that gaze as you stroke faster and with longer strokes!

I'd click on the light instantly.....and strip off any visible clothing to bare whatever I could for you!