Surprising Bi Request by Wife/Husband

We had always said we could ask each other Anything. It didn't mean we had to do it but it certainly put the idea in my head.
What was the request by your wife or husband, that had Surprised you, but also excited you.

 

That was her asking me to go downstairs and make love to her girlfriend. I thought I was being pranked and she knew that I wanted to fuck her but she told me that she wasn't joking and that her girlfriend... needed a man like me. I still thought I was being pranked but I went downstairs to where she was camped out on our sofa and told her that I was sent to make love to her (and waiting for the punchline of the joke) and that's what I did; she didn't resist when I undressed her and she wrapped herself around me when I kissed her. I spent the next hour and a half making love to her and even busting two nuts in her - she was a joy to have sex with and as I ate her, I could feel her cumming and her clit pulsing in my mouth over and over. I did ask her if she knew I was coming and she said she didn't but was very glad that I was sent to her.

Went back to my wife, who was sitting on the bed smiling her ass off and then she hit me with the second surprise by asking me if I could handle both of them and that was the night and the moment we went from being open to being poly. I had to go back downstairs to bring her to our bedroom so my wife could make the proposal of a lifetime to her...