I think you just described Hotwifing.
I always thought of cuckold as your partner getting fucked while you watched and didn't join in.

By no means am I an expert and quite honestly, I'm still very new to this. But I'm an intellectual guy which means if I'm going to take on a challenge, I consume all the information I can so that I can be fully informed to be prepared.
From what I've read and the suggestions I've gotten from Read more… people I've met at a munch, I ran some ideas past my partner (total sub) as we are currently geographically separated and phonesex is holding us over. She seemed to really like it so I'll share my plan.
Do anything that you guys find fun. It doesn't matter what it is as long as it's something you both fully enjoy. Think fun date night. Bring her home and wrap her in your arms and kiss her passionately as you walk in the house. Tell her, "I had so much fun tonight....but I'm not done and want more. Close your eyes and stay right here. Do not move." All of this, practice your voice tone to ensure you are adding some bass to your voice and your voice is not cracking. Say it like it's a command from an military Officer but say it at a low volume and ....say it at a pace slower than you normally talk. Confident people do not talk fast. They speak slowly and with very deliberate intentions.
Then continue, walk away and grab a blindfold. It can be an actual blindfold but not a sleep mask. those suck. If you don't have one use one of your ties. As she's blindfolded, slowly run your hands from her shoulders to her hands and guide both her hands behind her back. With one hand, hold both her wrists behind her back as you lean into her so that you are essentially cheek to cheek and say, "Follow me." Then walk her into the bedroom (slowly) and position her somewhere infront of the bed so that, if your room is large enough, you can sit on a chair and watch her or if your room is not large enough, you sit on the edge of the bed and position her far enough away so that you can watch her.
Then tell her, "I'm going to remove your blindfold....do not move until I say so." Then sit back down and say, "Now I want you to remove your (shirt/coat/skirt/coat/dress/whatever she's wearing), and I want you to do it.....slowly. Unzip your dress but don't let it fall. I want you to use your hands to slowly slide your dress off your shoulders and slowly guide it down your hips and ass. I want to watch." As she does, verbally let out a slight "mmmmmm" and "hhmmmmm" or "........yes." as she does. Keep going until she's fully naked.
Then slowly walk up to her and slowly run your hands anywhere on her body from low to high and cup the sides of her face. Give her a short but passionate kiss and tell her, "I really enjoyed that. You did very well." Then guide her over to the bed or dresser. Anywhere where you can have her stay standing but bent over so her hands are resting on something and it forces her to bend over and stick out her ass. have fun with her body however you want but don't touch any of her erogenous zones so no sex and no oral....not yet. Feel free to give her a few spanks or use any toy to provide some light spanks or use them to rub on her body to provide anticipation.
From here....it depends on what you have available to play with. Me? I have a structural support beam in the room which I've installed a hook where I plan to bind her hands together and hook them up high so that her body stretches out and her high heels make her ass stick out. I'd tell her, "I'm going to spank you now....and you're going to count the number of the spank, say my name, and tell me how that felt from a 1-10. So I want you to say, '1 Daddy, 4 out of 10' 2 Daddy, 6 out of 10" etc, etc. Finger play and intercourse would continue after I have some fun with her body...but I wouldn't do it for very long. I also have restraints on the bed where I will move her to the bed, restrain her and then fuck her face while she can't move.....or I'd restrain her face down, fuck her face and then tell her, "You can struggle....but it won't stop me from getting what I want." and then fuck her from behind.
Really though....this is super light bondage as I'm still getting to know what limits my partner has and I'm in no rush to get to the finish line. I rather enjoy the journey instead.