Eh... Layla's not jealous though... specially when it comes to Elena... I said it before kind of joking but not really, they do seem to be a bit gay for each other. That scene in the hot tub wouldn't happen if they didn't have feelings beyond just friendship for each other, imo.
But I agree that Layla might step aside if Elena confessed her love for the MC, because again, they're both super protective and supportive of each other.
Not the first time they kiss or get playful with each other, Layla was pretty much the driving force of that scene, not the MC convincing/taking advantage of them or anything, Layla wanted that...
Not much of a "moral hangover" afterwards(the "OMG, i can't believe we did that") either.
Also the scene ends because of Alexis arrival, it looked like things would keep moving forward if not for her...
And sure all the Elena-Layla get frisky scenes were alcohol enhanced, but that just means there's still some hesitancy around the subject.
I've said it before, it looks workable to me, signs are positive.