you can get on a (supposed for now) threeway route with both of them easily. But solo Elena, no.
I'm not sure if it will last, but I think the girls will give it a go. There is that moment at lunch where Layla doesn't buy Elena's fib that she just wanted to give MC/Layla space to be lovebirds. And after MC leaves, Layla asks Elena what the real reason is, and the scene ending right there.
Thats totally where Elena confides her feelings for MC to Layla. Imo, the logical next step would be either the Layla being angry and girls having a tiff, or the girls acknowledging the love triangle they are in and trying to make it work. And since Nyx doesn't have the girls on the outs after that lunch, I figure its the latter.
I can see it fizzling out, and the three are still on good terms by the end of the game, though.