My Wife But He Owns Her

Happily married to my very sexy wife for almost 3 years and it's a strange situation but so far it works for us. The thing is, she's been her boss's submissive slave for years, since she began interning for him in school. I met her and we dated a bit before she decided to tell me about her relationship with her boss. He's the CEO of his company and very wealthy and powerful in the local community. She loves the arrangement and gets tremendous pleasure in being and doing whatever he wants, whenever he wants it.
I was strangely aroused by what she told me and encouraged her to tell me about the things he does to her. It ranges from sucking him off probably 4 or 5 times a week to being used in his basement dungeon or being used as a corporate whore to land business opportunities for the boss. He's taken her away on biz trips and let vendors and sale people fuck the shit out of her.
She always (I think) tells me what she's been doing and as long as she is never hurt I'm more than OK with it.
When we got engaged her boss asked me to meet for lunch just myself and him. He told me that if I am good with the arrangement, she will become my wife to have and to hold, etc. but that she is still owned by him. Like he's happy to let me sort of have her on a lease basis.
I know it's crazy but between us Jennifer and I and Mr. C. have worked it out and it seems to be working OK so far.
I get very hard seeing him and my wife together and knowing that he's made her swallow probably 10 times as much of his semen as she's swallowed mine.
I sometimes have a wank thinking about the time he took her to the West Indies and got her assfucked repeatedly by a group of the blackest men she'd ever seen. It may be a stereotype but she said the smallest dick was a solid 10 inches and very thick. The longest one that went up into her colon was probably more like 14 inches but mercifully a little thinner.
She absolutely loves her life and being such a filthy slut.
She loves the freedom it gives her to do anything at all and have no shame because she's being a good wife and a good employee.
BTW, her title is special personal assistant and her salary is over a quarter million annually so we live a very nice lifestyle indeed.
Lately she's mentioned that she would be very turned on to let me watch her being used in person if Mr. C. agrees to set it up.