Forbidden Cuck

I've tried to lead a very open-minded, sexually liberated life. But even for me, my wife's tastes were a little shocking at first. We met at a club, had sex on the first night but got hooked beyond that. We married 3 years ago, she's older than me by 4 years but she is the sexiest, most loving and sensual woman alive on planet Earth. I wasn't going to let that connection go by any means. We love each other profoundly, and sex together is pure bliss.
Among other things, we connected because of our attitudes towards sex. We have an open marriage, but it's rare for us to connect with anyone else and have other partners. But when we do, we usually share. It was through this practice that she revealed her truth to me early on in the relationship. She was emotionally connected to someone else. She had stopped for a while because she was in this relationship with me, but she revealed to me she and her younger brother (38) had been in love since they were kids. She had even taken his virginity when they were teenagers, and explored together constantly well into adulthood. They even were caught once while still teens, so they kind of became outcasts in their family when they refused to stop. The revelation was a tough pill to swallow for me at first, because I had met the guy several times without this background. It became kind of a speed bump in our relationship, but we talked it out. If sex was about strengthening a strong, positive spiritual connection, it didn't matter with whom. I had seen her being fucked by other men before, it excited me, so we figured we could give it a try and share with her brother.
It was a game changer. No other lover, besides myself, fulfilled her that much. Watching my wife cum on another man's cock is like a religious experience for me, but this was on another level. Like she became one with him and with the universe, one orgasm after the next. Just watching her fuck her brother can make me cum so hard. And when we share her, dear god. It's pure bliss to feel her move, moan, gasp and tremble as if in a trance. I usually take her ass so that his brother can do the forbidden deed of pumping her own sister full of cum, a though that give me a serious hard on just by writing. Nothing in this world is more beautiful and lustful for me than both of us making love to my wife.