Twenty plus years ago I arranged for my wife to have a Sensual Massage.  David turned out to be a well endowned gentleman from Jamaica.  I watched my wife have sex with him over the past twenty years on and off.  We even traveled with him to South Beach where he stayed with us in our villa for days at a time.  I wasn't cuckold at that time, more of a voyeur.

Last spring we meet a gentleman from Barbabos (we're white btw) who was working in St Kitts.  On our last day as we were leaving we went to his room and my wife took her top off and he took off his pants and he fingered her and sucked her nipples to a huge orgasm (that after I had already given her one in our room)  

 
We saw him in Miami for one night of pleasure in January as we had adjoining rooms and I only observed for a few moments at a time but enjoyed listening.  He visited Atlanta and they played in his hotel room for three hours while I sat at the bar.

This spring we went back to St Kitts and they had fantastic sex in his room while I stayed in our villa.
I haven't had intercourse with my wife since their tryst is January.  He's hopefully coming to visit in May for two weeks and I'll be in my Kali cage the whole time, no touching my wife and she's already told me no watching unless I endure a major whipping.

I enjoy seeing her excited about being with his 11plus inch cock that is twice as thick as mine.  Also, knowing that at some point I'll get to claim her back.  
We've been married 35 years and my lust for my wife is at it's highest point ever.  Watching her kiss him, him fondling her before they play is so damn hot I can't get enough.