For sure, which is why I suspect it wouldn't be likely to happen.
Still, I think there ways to write a domineering role from a person that comes from a shy place, domination doesn't have to involve foul language and border-violence action after all. If Lena were to tell Holly that she's attracted to being submissive it could be a fun and tender way to develop Holly's sexuality between them. Play it up with the slow-burn that's already been going on between them so far.
Holly already didn't seem too opposed when her and Lena talked about the collar in the sex shop, she seemed to consider Lena's point about slave/pet-play not necessarily being degrading if it's done between consenting adults.
I actually think "tender domination" is a bit of an art in erotica and when it's done well it can be insanely hot.