Saw my wifes friends and family naked

One night my wifes younger sister was staying at our house and i went out for a smoke, as i was walking past the side of my house i noticed that the light in the spare room was on and as i passed i looked down noticing that with the way the blinds were turned i could see right into the room. my wifes sister wasn't in the room but i walked to the back yard and as i was standing there i seen her walk past the window in the family room.
i couldn't hepl my self and walked back to the window of the spare room and looked in. My wifes sister walked into the room and closed the door. As i stood there she opened her bag and put her tooth brush away. I watched as she undid her pants and pulled them down showning a tiny black G-string and her skinny little **. I have to admit she is a little skinnier than i like but has big ** and at the time she looked great. She pulled on a pair of shorts and i figured the show was over. but as i stood there she grabbed her shirt and pulled it up over her head showing a nice lacy black bra barely containing her big c-cups. She then reached back and unclipped her bra, As she did she turned away from me she picked up her shirt and in my mind i was saying please, please please turn around.
Almost as if she heard me she turned to face the window and my heart stopped. there she was ** with the firmest, roundest, most beautiful ** topped with light pink areola about two inches across and hard little pink **.
She walked over to the mirror and looked at herself lifting up onto the ** of her feet and dropping back down watching them bounce. I pulled out my ** and jerked off which only took about two minutes. just after i came watching her she put her shirt on and crawled into bed. I went in the house and was so ** i got hard again and had ** with my wife. I have since had similar oportunities with my wifes best friend who is a little chubby but has huge E-cups, Two of her cousins who are both DD-cups and next week her mom is coming who is a very good looking 43 year old.