She's Made Her Bed

My wife decided We were having a threesome and invited a huge guy back to our home from the pub we were in, giving me absolutely no choice in the matter.
I watched them fuck for over an hour, refusing to join them, as the guy came twice up my wifes pussy and arsehole.
Afterwards she told me he was a far better lover and made her orgasm multiple times.
The fact is my wife has always had trouble orgasming and she thought a guy with a massive dick ( It really was huge) might make her climax more easily. We'd tried counselling, sex toys and prolonged oral sex, yet my wife thought another mans cock would do the trick.
The rest of the night and the following day I resisted arguing and acted as if nothing had happened.
Yet inside I was so angry.
I waited a fortnight before getting in touch with someone my wife knows very well.
We met up at a lay by in the countryside and I let her know what had happened a fortnight previously. I also told her I was there to have sex.
We walked through a field and into some woods I used to play in as a kid. And spent the next hour having such an amazing time tonguing, sucking and fucking one another.
She had no problem orgasming throughout and told me afterwards she'd love to fuck again.
Over the next couple of months, knowing my wife had been with another so called well endowed man from her workplace, we had sex every chance we got.
We even met up and had sex in the back of my work van during her lunch hour.
I don't have a huge cock (six inches) yet my wifes younger sister loves taking it in her mouth pussy and just lately up her arsehole.
In a few weeks I'm leaving my wife to move in with her sister. They've never gotten on and I guess now it'll be even more fractured. But then my wife is still fucking her work colleague. I know this because he can't stop bragging about how he's fucking a married woman to his pub mates. And one of those mates fishes with me.
It's taken a while to sort out my finances and switch things around so my wife will only have her own money, but it's done.
My sister in law told me last night after we'd had sex, she's always wanted to be with me and then told me she loves me. My response was to go back down on her and have her slim body writhing as she had one orgasm after another.
My wife chose this, now she'll have to deal with it, as I have.