Bonus if you're there when she does it.
If hearing my wife cum while he fucked her wasn’t enough, my wife has said this to him and then looked right at me before
My wife and I had been flirting all day through texts on a Friday. We’re in our bedroom that evening and she asks me “are you sure you would want to know who I think about having sex with?” I say “YES I DO!” She asks again “are you really sure” and I say “yes, please tell me.” A third time she looks at me and says “you really won’t mind me telling you about another guy I’d like to have sex with?” My reply “not at all.” She bites her lower lip and nervously looks at me and says “Ryan” and she pauses. Then she says “I had the chance when I was 17 and denied him sex, if I could go back now, I’d definitely have sex with him.” I responded “no need to go back, why not have sex with him now?” Minutes later we were both naked and I was fucking her with everything I had. I knew she was thinking of Ryan and that made me even more horny! It might be time she sends him a message…
You found your wife after she disappeared at the party.
This is based on an actual event from very very early in our marriage, long before my wife cuckolded me. I had told my wife about my cuckold fantasies and we had talked about them during foreplay, but that was as far as we had gone. One night during foreplay I asked her who she thought was hot and she admitted she thought the trainer was and for the next several weeks after that I could not stop thinking about her and him together. I kept bringing it up and letting her know that I would be "ok" with her doing something with him. She would usually just laugh and say something like "oh I am sure you would be more than just ok with it". I even went so far as to buy her some personal training sessions with him. Nothing ever did happen between them, but I sure wanted it to.
When your wife told you that your sisters were taking her out for her birthday, you did get a little worried, because you knew that they had been talking with her about cuckolding you -- but you still are shocked that they have been successful in their efforts -- and you're not sure how to react, but you do know there is nothing you can do to stop it and that your relationship with your wife is about to really change.