Washing more than your sins away...

The next morning, you awake and remembered where you were by simply looking at your surroundings: Themyscira, where you were tempted to make a deal with the devil last night... You get out of bed, put on your dress clothes and peek out of your bedroom door. Two guards stood at attention on either side, glaring at you. You clear your throat and greet with 'good morning.' Can either of you tell me where I can shower?" And their expressions soften a bit as a guard told you of a nearby waterfall where the amazons freshen up. "Great. Will you take me there?" And they actually do, escorting you there by walking before and behind you. As soon as you got there, you marveled at how beautiful the scenery was; four or five times taller than you was the perfect length for a waterfall. The guards pointed to a spot where you can undress and lay out your clothes, and you took them up on that spot.

You undress behind a bush, folding your clothes in a pile. Then you snuck into the waterfall and begin washing as soon as you were concealed.

The guards stood watch as they kept your privacy as you bathed, but while you were washing up, someone managed to sneak by them and walked quietly up to you from behind to... join you?