Nice wedding present

My wife and i just got married a week ago and went on a mini vacation for our honeymoon, On our way back we stopped at her sisters place for the night. Her husband works off shore drilling rigs and is usually gone for long periods and was away at the time.
My wife went to shower and I went out to the alley for a smoke, On my way back i looked up at their bedroom window and could see someone moving in the bedroom, From the deck you can see in and see about half of their bedroom so as i came up the stairs i looked in and my wife's older sister walked out of their attached bathroom in just a towel. Normally i wouldn't have looked but she has always been someone who caught my attention, She is the oldest of my wife's siblings at 39 with my wife being the youngest of 4 at 28 and she was my mother in laws first from a previous marriage before marrying my wife's dad.
My wife and her oldest sister are built totally different and look nothing alike but i have always checked her out, She has 3 kids and has a "Soft" build but i have always wondered what she looked like under her clothes, I looked at the basement window of our spare room and their were no lights on so i knew my wife was still in the shower and since she usually spends a long time in there i figured i had a few minutes, All the lights upstairs were off and it was dark on the deck so i stood in the corner where i could see into the room but was hidden from most other angles.
She sat on the bed and i assume she was texting for a few seconds then went into the bathroom and whipped off her towel tossing it over the shower curtain rail, I watched as she stepped up in front of the mirror and had a full frontal view. I was pleasantly surprised at what i saw, She is short and cute with a very nice, round **, Nice legs which i have seen lots and smallish, saggy **. I watched her as she brushed her teeth and hair with her ** and ** jiggling as she did, She is soft around the mid section but doesn't have a belly just a little muffin top and from what i could see she doesn't seem to have a single stretch mark anywhere, She keeps her ** shaved completely bald and she stood in front of the mirror looking at herself for a few seconds then looked down and rubbed her hand over her bald ** a couple times. I thought i might get to see her play with it but she looked up in the mirror again and squeezed her ** together and let them fall and jiggle back into place, She turned to the side and looked at her profile giving me a good look at her as her body faced the window and she looked at her ** in the mirror.
She disappeared for a second and came back in a pair of sweats carrying a t-shirt and tossed it on the counter, I looked down at the window to our room and it was still dark so i turned back to their window, She stood in front of the mirror for a long time looking at and manipulating her **, She would squeeze them together then turn to the side and stand up straight trying to make them perk up, She stood looking down at them and pinched and tweaked her ** for a minute then turned to the side and looked at her ** sticking out her chest.
Out of the corner of my eye i noticed the light come on in our room downstairs so i quietly crept away from the window and into the house then slipped downstairs, My wife said "go brush your teeth" then dropped her towel and crawled onto the bed, I did and it's a good thing that her sisters room is upstairs at the other end of the house because i nailed her for half an hour and came twice.