If the couples are fairly new to LS and all we're doing is parallel play with our own partners (some touching is cool though), is it too weird to add in roleplay? Too kinky? Thoughts?

Roleplay scenario recommendations for couples parallel play (please)? Any creative folks out there?

The roleplay idea that sprung to mind in semi-lucid waking state this morning is probably a bit "advanced" and something more benign would be better:
Parts to play: One presumably sterile husband, one wife needing direct "help" getting pregnant, one stud, and one sexy nurse. (the parts could be mixed up, but only the actual partners will be having sex)
I don't know if this would be their cup of tea so I'd want to be able to suggest many potential roleplay scenarios they could choose from (after whittling them down with my wife). This one is just an adaptation of roleplay my wife and I engage in (I'm the stud, she needs to get pregnant) by ourselves and the other couples' tastes will be key if it's going to be any good for the 4 of us. Atm, I'm thinking my wife plays the sexy nurse and I play the sterile husband (I'm a compersion guy but this isn't quite on target, though I think I can make it work - better ideas for my role would be appreciated) getting a bj or sex from the nurse at some point to make it a 4-player game.

Background on us:

So my wife (F38) and I (M43) are still new to LS. We've had parallel play, separate beds, sticking to our own partners once. It went well and we learned more about what we want. 🥳
I wrote about our experience here:
https://www.reddit.com/r/Swingers/comments/14nryvm/parallel_play_tipstricks/

One thing we want is to take turns. With the 1st experience, we all got to it at the same time but we'd like to savor the experience a bit more, being watched while we have sex, watching as they do while engaging in a little foreplay ourselves, some touching from the other couple, etc.

I'm the one who really wanted to get us into LS and mainly b/c I've always been fascinated with group sex and above all else I find my wife to be incredibly hot and love the idea of other people appreciating her and her getting off in exciting situations (and ideally me participating directly). My wife has mostly been going along with me and doing only what she's comfortable with. With the couple we parallel played with, they were very good, very quality people who we felt very comfy around in general. BUT, my wife wasn't attracted to the guy and his overt interest in her put her a little on edge (though he was very much a gentleman).

We've had 2 entirely platonic dates with another couple that's a little further along (just soft swap so far) and the last date culminated with a frank discussion about where we are all at on our journey, what we fantasize about, and where we want to end up ideally in LS. This is the 1st couple we've found where everyone is 100% mutually attracted (my wife is very selective). We have a lot in common, I can identify with both of them as can my wife, they're our age, the wife is bi-curious and prefers to receive and mine is bi (untested as such, but we're sure 🤤) and really wants to give, and the list goes on. We're setting up a date in a few weeks to have dinner and then head to a nice hotel next time.

My wife is eager. As we were setting a date and without any prompting, she told me that same bed and some touching would be fine: them touching her and me touching the other wife too! That's huge and unexpected b/c my wife can get super jealous. I posted about that some here (it was intended to be a more general advice question, but the swinging element was key and I got a lot of sex-negative/anti-NM rage as well as helpful psychological insight comments so be prepared if you choose to read):
https://www.reddit.com/r/infj/comments/14tci0c/tips_for_an_infj_who_gets_intensely_jealous_to_be/