Desperate for an Orgasm

My mom dropped my brother and I off at the pool. My brother is younger than me. He has special needs and just discovered masturbation. The thought of him masturbating gets me horny.

I was so desperate for an orgasm that I went into one of the family changing rooms. In there their is a shower area with a bench across from the shower head which slides up and down on the wall. The shower head also has different settings.

It wouldn't go low enough to reach my clit so I stripped down and climbed onto the bench then put my back on the same wall as the shower head and manouvered myself so I was straddling the shower head.

I then turned the shower on the jet(it wasn't that strong) and I had one of the most powerful orgasms to the thought of my brother masturbating.