I Have A Decision To Make

Caught my wife having sex with another man.
She didn't know I'd taken the earlier train, so when I got dropped off by the taxi and decided to go around the back of the house, I looked through the patio windows to see my wife bouncing up and down on a guys cock.
As I stood watching he lifted her off, moved my wife so she was kneeling up on our sofa, then slid his cock up her arsehole.

It wasn't as though I didn't want to rush in and do something, I did.
But not to beat the guy up. No, I wanted to get naked as they were and have my wife suck on my small but already hard cock, as he fucked her.

I knew this day would arrive as my wife loves being fucked hard. My cock is just over four inches erect, and although she'd said many times she was happy with my size, I understood one day she'd want a larger cocked guy to fuck her.
I didn't rush in because I didn't want to be seen as a cuckold then, but now seven weeks on, I know they fuck at least twice a week and I'm desperate to be up close as the guy fucks my wife.
I've even chatted to a couple of guys on a website forum who have been cuckolds for years, and they tell me if I want to stay married, I'll have to submit to my wife's sexual requirements with other men. And possibly have to suck cock too.

Going back to the day I caught them having sex, I found myself going for a walk after leaving my bag in the garden shed. Entering the woods near to our home I masturbated with the vision of the guy fucking my wifes arsehole, and believe you me when I came I had such a huge orgasm.
I suppose I'm going to have to decide what im going to do.
Divorce or cuckold.