Miserable neighbour!

A few years ago, we were building our house. We had bonfires, lots of noise etc but our next door neighbours were great about it.
The neighbour who lived 300 yards away, there was a field between us but we could see each other's gardens, was less helpful.
Firstly, she apposed the planning application, complained constantly about the noise, and when we had some work done on unsafe trees complained to the local council. Everything we did was correct and legal she was just someone who liked to complain.
We'd finished the work and everything seemed to settle down nicely, everyone who passed the house commenting how nice it was.
During a village event I was sat with my neighbour and L, the miserable neighbour came to say hello to him. We all got talking, I'm not sure L realised who I was until the three of us where walking home. My neighbour left us at his gate and L and I carried on up my drive, there's a public footpath that runs up the drive, and this is when she realised who I was.
She was a little surprised and I teasingly said, I'm not such a bad guy after all am I? She blushed a little and started to apologise. I cut her off. Look, I said, I realise we caused some disruption and apologise for that but it was a building site, what would you expect? L said she was sorry and perhaps if she'd come over and spoke to me we may have got along a little better.
You've done a good job though the place looks lovely. Thank you I said, would you like a look round? I'd love too she replied. I've been saying to my husband I'd like to look round. Come on, I'll give you the tour.
I showed her round downstairs and asked if she wanted to see upstairs, she did!
Spare room, office, shower room, dressing room and then the master on suite.
When we walked in she started to smile. A first! She was one of these people who has an angry face, always seems to be scowling. Not helped by being skinny.
I asked her why she was smiling. She blushed, oh I can't say! Oh yes you can. She looked me in the eye and said if this gets back to me that you've told someone I'll be mortified. I won't, what is it?
Well, she started, sometimes my husband will make love to me while I'm lent on that windowsill. She was pointing to their bedroom window which was 300 yards away but in line with ours.
I'll never be able to look out at your house again without thinking about you leaning on the cill! I replied. She came back with, aren't you shocked I've told you that? A bit, but what I want to know are the details! Is that cill the same height as yours? Is this first thing in the morning sex? I was teasing but L didn't understand and answered. Yes to both.
Show me how you stand, she did. I want up behind her got hold of her hips and very gently pushed my groin against her bum. I stopped.
L said you're just being naughty aren't you? I'm not going to be able to tell anyone I've been in your house now. It could be worse you know, I said backing away. How? I tilted my head to one side, gave a look of 'o come on you must know what I'm thinking'. The penny dropped, she blushed and said that would be very very naughty. I replied, but only if we actually did it! Just think if we did! Be a great way to become friends!
She stood perfectly still, thinking, she was actually thinking about it. Hell, I was teasing her, but I wasn't going to back down. Was she calling my bluff, I don't know.
You wouldn't tell anyone would you? It would just be us, our secret? Shit I thought, I don't really like this women, she's not my type at all.
L was looking at me, I was now sat on the bed trying to work out how to get out of this when she said. You've not done this before have you? Done what, I said. Cheated on your wife, you've not been with another women have you? It was true, I'd cheated on previous partners but not C.
No, and I'm just wondering why I'd cheat on her with you, someone who caused us a fair amount of grief. L replied, the perfect cover.
Let me tell you something. I cheat on my husband because he's crap in the bedroom, he is all shove it in, get it over with and off he goes.
So, if you like it slow, like to make love, I'm a willing partner in crime!
C has a condition that makes sex painful for her, I don't get any sort of sex life so thought, why not. I need a release. L could be that. Most people we knew, thought we didn't like each other, so as she said the perfect cover.
I looked up at her, smiled back and said, let's see how this goes. I pulled her towards me, pushed my head between two small breasts, grabbing her small arse pulling her closer. She was so light I picked her up and turned her on to her back, laying her down on the bed. I unbuttoned her long shirt, kissed her stomach working my way up to a thin lacey bra, lifting it off her breasts and sucking her nipples. She gasped, said be gentle.
I kissed her breasts, sucked on her nipples, worked my way back down to her belly button. Meanwhile my hand was between her thighs, rubbing her warm pussy through her knickers and tight leggings. She was starting to move with me, but I wanted to feel her moist pussy. My hand went inside her leggings, pulling her knickers to one side I felt her wet pussy. I rubbed between her pussy lips making her even wetter. She was moaning with pleasure, I lifted her and she slid out of her leggings, leaving her knickers.
I was rock hard and she could feel it. I dropped to my knees, saw just how skinny she was. I pulled her knickers to one side kissed her pussy lips, started to lick her swelling clit, she orgasmed. Pushing my head tighter against her pussy, I kept licking her clit, she kept cumming.
I found out later that L was a size 6.
I stood up, still clothed. I dropped my shorts, pants and rubbed my hard throbbing cock against here swollen clit. She was having multiple orgasm's, I stopped moving. Removed my shirt and laid naked next to her. I was at least twice her size. She looked so small laid next to me.
She took hold of my cock, started to stroke it, moved on to her knees and took me into her mouth. I had two fingers inside her, she came again.
I stood up, took her arm and guided her to the window, she bent over, spread her legs for me. I played a little, gave her a gentle tap on her skinny arse, then a bit harder and then harder again. She just said, again, smack my arse again. I did, not too hard and it was already getting red.
I then positioned myself, bent my knees a little and entered her from behind. She was wet, dripping all over my cock. She reached down and cupped my balls, squeezed them. I started to move, L moved with me. I was getting faster, deeper and enjoying myself. I was looking out of the window, at her bedroom window and wondering if she'd every think of us together when her husband fucked her as I was now. I came, gently, slowly controlling myself. Pushing my cock as deep inside her as I could and stayed still. I was rubbing her nipples, she still had hold of my balls and we started to rock backwards and forwards. She orgasmed again, we continued to move together and within a couple of minutes I was banging her pussy with all my strength. As fast and as hard as she wanted. I came again, this time uncontrolled.
We stood as we were, my cock softened and slipped out. She turned, smiled and dropped to her knees and sucked me dry.
We dressed and went down stairs. We exchanged numbers and she left saying, perhaps we can meet in the woods next time!