I got to watch with benifits

This story started when i was 20. I lived at home with mum and dad. We lived in a two story house, my room was next to mum and dads room. I did not work as work was hard to get at my age.
I came home late one Saturday nite and as i walked past mum and dads room i heard them talking. I heard mum asking dad if he had been watching the lady next door in her pool and he said he had. They talked for a while about what she was doing in the pool and it turned me on. I then heard them start to fuck and mum asked him if he was fucking her and he said yes so i went to my room and went to sleep.
The next morning when i got up i went to the back room upstairs and i had a good view of next door into there pool. There was nobody in the pool so i went down to the kitchen and had some breakfast with mum. We talked for a while and mum told me she was going shopping and asked if i wanted anything.
When mum left i went back to the back room upstairs and looked into next door. I saw the lady next door and she only had on a brief two piece swimsuit. She sat on one of the chairs, laid back and put her legs on either side and i had a great view. I took my cock out of my shorts and started jerking off. It was not long and i cum. I cleaned the mess up and went back to my room. This was the first time i has seen a woman with next to nothing on. She had nice size boobs as well.
I was so careful over the next two years not to get caught spying on the lady next door. I did stop and hear what mum and dad were talking about and every time it was about sex. It turned me on. I would go to my room and jerk off. Mum told me they were going away for the weekend but they would be home Sunday late.
I told her i would be home all weekend and i would not be having any parties.
Friday nite i checked out next door but nobody was in the pool area so i watched a bit of tv and then went to bed - naked - - got up around nine o'clock in the morning and went to check out next door. The lady next door was on her chair, with her legs open and reading a book. It was not long and i had a hardon. I slowly jerked my cock watching her, I saw her roll over onto her front and as she did she undid her top and dropped it onto the ground next the her. I was hoping she would roll over onto her back but she did not. Her bottom was small and did not cover it all only up her crack. It was a turn on. I started to be ready to cum so i stopped jerking. My cock was so hard. I stayed watching and it was about 30min later she rolled over onto her back and then i saw her boobs. This was the 1st time i had seen uncovered boobs. I took hold of my cock and it was not long and i shot a load of cum. I went and had a shower, got dressed and went out for a while to calm down. When i saw other women all i thought about was looking at there boobs.
I went home about 7pm, the 1st thing i did was to checkout next doors pool. Nobody was in it. I had my dinner, watched tv and then had a shower. About 8.30pm i went and checked out next doors pool and to my surprise she was in the pool with a guy.. The only lights on were the lights in the pool. I could still see them. As i watched i saw them kissing and cuddling. It was good to watch them. It was not long and they got out of the pool. They were both naked. Her pussy was clean shaven and his cock was hard as. As they kissed i watched as she jerked his cock and he fingered her. I was jerking and i had to stop before i cum. They laid on a towel on the ground and he got on top and started fucking her. This was the 1st time i had watched anyone fucking. I took hold of my cock again and jerked it until i cum. I watched them until they both cum, they got up and walked back into the house. I went and had another shower and went to bed. I checked out the pool the next day and nobody was there.
That arvo my parents came home so i had to behave myself so i did not get caught. My dad had to go to work the next day and mum said she was going to the gym and would not be home until about 12pm. I heard mum leave about 9.00am so i went and had a shower and went to the back room - naked - to check out next door. She was in the pool area on the chair, with her legs spread but her top on. As i was watching i noticed her put her hand on her pussy. I had a hardon and i started jerking it. She put her hand under swimmers and she started moving it up and down. After a while she took her top off and her bottom and she was naked, she looked so good. I was so tempered to move infront of the window and keep jerking so she could watch me but i heard a noise and as i turned around i saw mum at the door. I froze but mum then told me not to stop and she walked over to me. I looked back at next door and mum came over to me and looked at what i was watching. Mum then told me this is what your father watching. I don't mind because it has improved our sex life. I covered my cock but it was still hard. Mum gave me a cuddle and told me it was ok to watch and all of a sudden i felt something on my cock and as i looked down i saw mums hand on it and she was jerking it. Mum kissed me on the cheek and told me to enjoy as she jerked my cock until i cum. She then cupped my balls and played with them. She then told me it is between her and me only.