At some point the open conversation needs to be had. I agree with the above that this is not the best method to express this desire, however, many men struggle with revealing this kink especially when it turns them on to have it done without their permission, BUT this is not an excuse, of course, Read more… to just go with it. Even CNC has the word consensual. The best thing would be to lay it out plainly. Especially as your submissive, he may actually enjoy you taking charge of the conversation. Approach it and be clear of all the details. Tell him you want to fulfill any kink he wants to enjoy, but that even if from then on, only safe words apply, you need to set initial boundaries and clear limits so you can fully enjoy this. Communication, communication, communication. Start with the simple, "I want to fulfill your desires as your partner, would you enjoy watching me with another person? If so, we need to have an open and clear discussion about what boundaries you want us to follow, so that when it happens, you can play out the fantasy exact as you want." Many of the questions you ask only your partner can answer. Make it clear, does he want to interact, does he want to just watch and thats it? The end point is for you BOTH to enjoy it so within the boundaries of accepted communicated terms you can absolutely enjoy the sex, its what he wants (if your instincts are correct, and this will be confirmed by communication)
You are doing absolutely the best thing by keeping your partner's feelings at the forefront but its also very, very important your feelings are regarded as well. If theres more advice I can give or assistance, please feel free to message me! I hope you both are able to increase your joy and pleasure!

Yes Queen.