I di it, then she did it.
In our younger years my wife and I often showered together. I would shampoo her hair and would frequently get a hand job in return. I was late getting into the shower due to a phone call and she was already doing her hair. I said if you are doing it yourself so will I, and began stroking myself.
I expected her to stop me but instead she just watched saying nothing, but her nipples stood at attention. Before long I shot a massive load onto her tummy which slowly ran down into her thick blonde bush. She is really hairy and very light blonde, I love it.