Does it have to be an object inserted? Could it be the force of water passing between the woman's legs? Like water from a bathtub spout, showerhead ...
I am remembering when my wife was learning and trying to get up on a double set of water skies. Sitting in the water with her legs kind of opened, waiting for the boat to up on the skies. She was dragged behind the boat for a while before trying to stand up. She tried that several times before she finally was able to stand up on the skies.
In the meantime the water was rushing between her legs. My friend who was driving the boat made a joke saying she will be 'squeaky clean' for me. He didn't gun the boat very hard since she was a new skier and didn't want to yank the pull rope from her hands, but she must have felt the water rushing in between.
Now playing with this storyline forward. What if there was a bet for the loser go water skiing naked with doubles? The boat captain on purpose does go fast enough to let her stand up. That water would be rushing between legs without a bottom covering it up. How long would it take? Everyone in the boat just waiting to see if she would cum with the water dragging behind the boat.
