Of course! And I hope more than one!
There is
a lot to work with here.
Especially Iris. Derpy, young, innocent, and naive is a recipe for... disaster.
That, to me, in the core allure with her and the NTR Sisters. Not so much the NTR that can be attached to it, which I'm sure there will be, but... Laura, for example, is someone familiar - someone Iris knows and has a level of trust with.
Kate and Sabrina, not so much, so if Iris gets tied up with them, there can be a larger degree of nervousness, unsureness, and perhaps some fear.
Her first sexual experience is such a large leap.
She is dealing with tall, strong futas. The first real cocks she sees in front of her are so monstrous. Locked like a deer in the headlights, she can't say no. Would she want to say no if she could?
She's standing between them. Both of their titanic cocks fully erect and pressing against her petite body.
She's lying down... one of them is trying to put it in... will that thing even fit?
Maybe she wanted to have her first time with that girl she sort of liked, but here she is with this Amazon of a futa.
Sabrina put it all the way in, Iris' brain can't comprehend the feeling of having such a large invader, for her first time no less!
I won't drag it on, but you should get what I mean with this sort of feeling for a character like her.
Just my mind wandering, but it sounds like you have some very lovely plans based on what you've said!