Final part of the story.
All characters over 18 years old.
6 Months later
Since that weekend when things came to a head, Tracy admitted to her husband (and my brother) Paul that I had been fucking her since she had come to stay with me to do some research for her job.
Tracy told Paul that from then on he was to be our cuckold and would only be able to watch me fucking her.
I went home after the weekend somewhat in a daze, I had gone from a casual affair to a full time lover of my sister in law and master of my brother.
So my life had changed, the biggest issue became obvious, I lived in the North, they lived in the South. During the early weeks, Tracy was texting me several times an hour telling me she needed me to fuck her, to lick her. Most messages came with photos of her bare wet pussy. Then hours of video call / cam sex in the evening. This couldn't continue, I couldn't concentrate on work during the day and was tired at night.
The obvious answer was for me to move my life South and live with Tracy full time. I could work from anywhere with WiFi, as could Tracy, but Paul's job was in an office so it made sense for them not to relocate, besides which, I lived in a city apartment, they lived in a detached house not far from the sea.
The day after Tracy made Paul our cuckold, we went to a sex shop and bought a cock cage, and leather collar with cuckold written in big silver stud letters and a lead. He wears the cage at all times, and the collar whenever he is at home. When we are on video call we would make him kneel at Tracy's feet and just watch her playing with herself following my instructions.
Before we made the decision for me to move I went to their house to reinforce to Paul that it was my house and Tracy was now mine to fuck as I please. At first you could tell he hated it, and was at times rude to us, we disciplined him accordingly and he learnt that it would be much better for him to comply and in time would enjoy.
It was 6 weeks after that weekend that I moved my life down South to live with Tracy. I had rented my apartment out which would give me a further steady income as there was no mortgage.
I had hired a van, loaded everything in and drove for 6 hours before arriving at my new home. Paul helped me unload, putting most into their garage. Paul had been instructed to move all of his clothes out of 'our' room so I could move mine in, you could see the humiliation in his eyes as he did it.
I was exhausted, Tracy had cooked a meal, it was delicious, combined with the couple of bottles of beer, I was done.
We had left Paul clearing up, Tracy and I sat in the lounge. It had been 2 weeks since I had seen her and she was horny. Within seconds of sitting down she was at my trousers trying to get my cock out.
"Oh baby, it's been too long I need your cock in me, now," she said desperately.
I was tired, and that was making my cock not as responsive as usual. She had it in her mouth bobbing up and down but wasn't getting hard enough.
She had an idea, eating her pussy usually got me hard so she lay down legs spread, I kneeled between them and started eating.
"SLAVE" she shouted.
"Yes mistress," was the prompt reply.
"Get on your back between masters legs and suck his cock," she ordered.
"B..but,"
"SLAVE, DO IT," she screamed at him.
I then felt his head between my knees and the warm sensation of my cock in his mouth.
I was fucking his face, whilst eating pussy, It didn't take long for my cock to get hard in a man's mouth.
"Dave fuck me, fuck your wife, in our home. Do me hard please." She said lovingly.
"Slave, you can watch your master fucking his new wife, and if you're lucky you can suck his cum from my cunt."
