Enzo/Hayley/Jack Relationship

It was pretty clear that Hayley and Jack had a close relationship, but was there supposed to be the implication that they were intimately close? Hayley first describes Enzo as someone who looks/plays/sings like her brother, and then almost immediately gets involved with Enzo in a complicated sexual relationship. I don’t actually care if that was intentional, because this movie was pretty dark anyway. IF it was intentional, it could have been a little more explicit instead of just implied. At least it would have explained a little bit of Hayley’s fascination with Enzo who otherwise seemed like a spaz.

The fact that Enzo wanted Jack first, and Jack rejected him is also interesting. Hayley really was better with Jack in her life.