Our house backs onto neighbours who are in their forties. They both work night shifts, so I get to see them quite often during the days. About for months ago I was cleaning our guest bedroom which is at the rear and noticed movement from their bedroom. Their cutains were wide open and as our homes are only around seventy feet apart, it was easy for me to see what they were doing. The woman was knelt up on the bed, side on to the window. Her husband was behind her, both were naked and I watched as he fucked her with the biggest cock I've ever seen in real life. I found myself transfixed as the carried on having sex and only shied away a little when they both looked my way. They didn't stop fucking and if anything he seemed to thrust harder into his wife.

I couldn't help myself from getting turned on and soon found myself touching my pussy through the thin material of my skirt and knickers. They saw me stood watching them fondling myself, and as if it was planned he pulled out of his wifes pussy, stroked his huge cock a few times and came all over her arse and back. Only then did I stop to think what I was doing.

It happened again the following week and the same weekday. This time two things were different. She was riding his cock as he lay on the bed and I kind of reciprocated by masturbating watching them. They both saw me touching myself and with my pussy wanting to be satisfied I took off my knickers, put my right leg up, placing my foot on the low window sill and proceded to play with my pussy and clit. I came seconds after it appeared the woman had cum all over her husbands cock, as she'd arched her back and her head had flipped backwards. When he came this time he must have filled his wifes pussy, as she got sraight up walking out of their bedroom cupping her pussy mound.

It became a weekly event and I got more intense with my masturbation. Often starting before they did and after buying one over the internet, I began to use a dildo during my voyuerism. Last week I finally met them out shopping at a nearby supermarket. My husband was there so I couldn't say much, but what I did say was "Nice to meet you both, love to join you sometime". It went straight over my husbands head as he thought I knew them from my part time job. The note in the letter box the next day said "How about next Friday, call round at 11am Linda and Pete x".

Two days from now I'll have to decide if I'm going to take up their offer. It's not easy denying myself what I know for sure will probably be the best sex of my life so far.