Didnt know she was watching

When i was 17 yrs old i went to germany on a trip for 4 months
The first 4 weeks went by. I was getting frisky, and always hard. Hadn't been with a girl in 3 months, and hadn't jerked off in ages.

I was staying at my mom's sisters house. One morning they all left for work/shopping, i asked them if i could stay back and rest. As they all left, i let half hour go by. I went into the washroom sat on the can, took all my clothes off. Slowly made my way down to my cock. I started rubbing my cock then small strokes. This washroom in germany had a window above me to the left. I didn't realize it was open nor visible from street level, but this window was in the back of the apartment. 2-3 minutes went by, i was just still stroking lightly wanted it to last a while. All of a sudden i heard a knock on the washroom door. I quickly towelled, checked to see who it was, turned water on made it look like i was to shower

It was my uncles wife (now ex-wife) at the time she was 21, i was 17,,she was about 5'3. 130 lbs the weight all in her breasts..very big chest. I came out of washroom said, i didnt hear you was about to shower. She was all smiling, finger in her mouth...she looked around back n forth to kind of see if anyone else was around.....
She put down her coat and keys on the kitchen table. I said i will be back let me get changed, she said dont have to just down. As i sat down on kitchen chair, she came and put her hands on my chest, gave me kiss on cheek i was nervous and moved back, i said what are you doing my aunt....She said "my husband is your uncle, i am just your aunt in law, i am legal:,,,,i still pulled back and got walked into living room near bedroom to change...she followed me, and said dont be mad, i got turned on by what i saw.

At that point i knew she saw me jerk off

I turned around all red at the point.

She again came up to me, put one arm around me, other hand on my cock, kissed me again and said lets have some fun. She took me back to the bedroom, removed my towel, i lay naked on the bed. She began to lick me all over, and sucked my cock. Just pulled back to not let me come, i held it in......She then started to get naked, exposing her big big natural breasts. She lead my mouth to them i sucked away one eye on her tits one eye on the door in fear getting caught. As she got totally undressed, exposing this beautiful natural hairy pussy, and sexy body with big big breasts,,same body as gianna michaels, maybe 10 lbs heavier but all in the right spots...as she got naked, she lay on top of me, rubbing her chest, and pussy all over my body, as i got harder, she slowly slid herself onto my cock, began to ride me, leaning over riding me, letting me suck her tits and grapping her ass at same time She then got up, lady down on the bed, lifting her ass, demanded i fuck her ass. Slowly nervously but wantingly i put my cock in her ass, and started to fuck her. She demanded i cum in her ass. so shortly later i did.. we then lay on bed naked for 10 minutes, she then come over on me again gave me a full blowjob.

the last 3 months there, i made sure i slept many nights at her place/uncles place....i was to stay there anyways, it was 2 months my aunts 2 months my uncle. little did they know what was happening..but last 2 months, we did it many many times