I spied on my wifes little sister

Yesterday my wifes little sister came over, I knew she was coming because she is having her bathroom renovated and for the last two days has stopped by to shower on her way home from work, As it worked out my wife had a meeting at the school so it left me and her alone while the kids were outside playing.
She went into the bathroom and I waited until I heard her feet squeaking on the floor of the shower as she moved around, I quietly picked the lock on the door and opened it a crack, I peeked in and all I can say is thank you to whoever invented glass shower doors, From the door I could see every inch of her body perfectly, She is short and just slightly chubby, beautiful round **, Big round ** and a nice looking **.
I stood there and watched her while listening for the door, I watched her wash her hair, and her body, Wash her big ** and round ** then watched her shave her legs, armpits and finally her cute little **, She sat on the bench in the shower which put her ** facing me and I had a full view of her spread ** as she shaved it, It is perfect.
When she stood up again I gently closed the door and went to the other bathroom and jerked off twice thinking about her.