First of all I'm copying most of this from my diary, which was written the night of when this happened. I've had to change the start to fit this site, and I've missed out some details as not to identify both myself and Frank.

It's not my neighbour I hate, it's his wife Helen. Frank is a very good looking muscular older man (He's 51). A man who works hard and keeps his wife in relative luxury. She's one lazy fat bitch who sponges off his income and his giving nature. She hardly ever gives out for him, as I've found out, and always expects him to do most of the chores around the house.
Last summer (Wasn't much of a summer mind you) my parents took my younger brother to a local zoo, leaving me to some peace and quiet. I heard Frank cutting his grass next door, and wanted to ask him about an event, which he was helping with locally. I waited for about half an hour and then as I've done many many times in the past, I hopped over the fence and walked into his very large garden shed.
I found Frank masturbating whilst looking through a porn magazine. The size of his cock was what had me gasping. It was far larger than my boyfriends and much thicker too. Frank looked round when he saw me and went bright red. He tried to cover himself up, but his cock was too big. Eventually he grabbed a bag which had had compost in it and put it in front of him. Trying to say sorry and that he didn't normally do this kind of thing, I found myself telling him it didn't matter, and that I was surprised lots of women weren't after him for his gorgeous looking cock.
His face changed when he heard me calling his cock gorgeous, but I wasn't lying, I was actually turned on and his cock did look gorgeous. Not waiting for him to reply, I walked over to him, removed the compost bag and took hold of his still erect cock.
Frank is a lot taller than my five feet six inches in height, as he's six feet two. So I had to get him to lean down to kiss me as I played with his cock. Even though we'd known each other since I was eight, Frank and I kissed like we'd sexually lusted after each other for a long time. His cock was throbbing in my hand and my pussy was becoming soaking wet with the lust I had for him and his cock. Letting go of his cock, I lifted my short loose skirt, pulled my knickers to one side and leant against the potting shelf which held his compost, small plants and pots. I didn't have to ask him, he had all the encouragement he needed as I slipped a finger inside myself.
I'm not saying you have to have a large cock to make you cum quickly, I've cum fast with my boyfreinds cock too. But Franks much larger thicker cock, had me cumming far harder and with more intensity than I'd ever experienced with my boyfriends six inch cock. In one long thrust he entered me from behind, as I removed my finger and his cock felt devine inside of me.
Reaching around me, he took hold of my small breasts through my tight cotton top (I don't wear a bra) and began to squeeze my tits as he began to fuck me hard. Within a minute I was having my first orgasm. I was allowing a much older man I'd known for eleven years, almost like a second father, and believe me I was loving every single thrust of his cock entering me.
His size, physical strength and his beautiful cock only made me want to please him more. So after a couple more minutes of him fucking my ever increasing horny pussy, I got Frank to lay on a pile of full compost bags. With his big cock facing straight up, I lowered myself onto him and let his cock slide all the way inside me, until I felt his pubic hair on his balls, tickling my arse. It allowed me to be the one who set the rhythm and depth of his cock inside me, and I like it like that sometimes. Looking directly into his eyes, I came again as his cock hit my G spot over and over again.
Frank told me he wanted to cum inside me, but I knew I wasn't on the pill.
Knowing how thick and long his cock was, I was at first reluctant to try something I'd only tried once before with a previous boyfriend. Lifting off his cock I was gong to suck him to completion, but I needed to cum again myself, so instead, I gripped his slippery cock and guided it to my arsehole. Slowly I sank down and let my bum get used to his size. It hurt for some time and I was about to just give him a blow job, but I sank down quickly and his cock pushed past my sphincter muscles. It still hurt for a minute or so, but I eventually began to feel something I'd never experienced before, an orgasm rising throughout my whole body. It seemed every single sense in my body was electrified. No more than a minute had passed when I began to shake with the deepest orgasm I'd ever experienced. It was the green light for Frank to continue to fuck me, as he began to thrust upwards. My arsehole had fully accepted his cock and it felt utterly amazing.
Putting my right hand down to my pussy, I started to rub on my clit as frank and I fucked each other. His hands had hold of noth of my tits and raised nipples and I was in a sexual haze. It wouldn't have mattered to me one bit at that point, if his wife had walked in on us. I was that involved in what we were doing with and to each other. My arsehole was bouncing hard and fast on his cock, and Frank was beginning to make the noises I know meant he was close to cumming.
Telling him to cum inside my arse, I felt Franks cock pulse inside of me and then he let out a low long grunt of pleasure and his cum spurted deep inside my arse. The heat of his cum filling me and his full on thrust to enter my arsehole deeper, brought on another orgasm. It wasn't as intense as my first ever anal orgasm, but it was just as long lasting. When it subsided, I slumped onto Franks chest and we held each other.
It was her voice, her screechy pleading voice which brought us back to reality. We separated, even though I just wanted to feel his cock inside me until I was ready. Getting ourselves together, I'd only just put my knickers straight when Helen walked into the shed. She said something to the effect of hearing Frank moan as if he was hurt. When I told her it was me hitting him with a rake accidentally she laughed. I didn't as I felt Franks cum begin to leak out of my arse. Making my excuses and asking Frank to inform me later of what was happening with the local event, he smiled, and told me he'd call by when it was appropriate.
That appropriate time has been whenever we've had chance to have sex together. We both know it's only sexual fun and I know frank would never leave his dependant wife. But over the last few months at least, our sex together is becoming something I just cannot see myself being without. I've grown to love Frank and our times together and know if circumstances were different, I'd leave my boyfriend and most definitely live and love with Frank.
Society says we shouldn't, but given the chance, I'd make my life with frank tomorrow.