The first NTR flag was avoided, but only because of the intervention of other ghosts; Greenhead really didn't
save Karen at all, since Sayuri was the only one able to successfully fend off an intruding ghost. Now another flag is being raised because Greenhead is starting to have genuine feelings for the boss lady.
I suppose both the MC and FMC knowing that they are being manipulated by Greenhead is some credit to their awareness, but it's equally confusing since neither one of them has any capacity to prevent him from doing whatever he wants while they are in his presence; so why risk further contact?
By the way, what happened to the other pool party guests? Since only Karen and Greenhead could see the ghosts, do the guests see Greenhead talking to himself and being suddenly stripped and dragged around the pool, while his penis is abused by an invisible force? They would also see Karen talking to herself and making weird gestures. You just know that someone would upload that footage online. It'd be like one of those religious videos where people are flopping around on the floor speaking in tongues n' shit. Since ghosts are normally tied to the immediate area in which they died, does that mean a bunch of girls died in Greenhead's pool?
@Dipuc4Life: I'm still wondering exactly how Karen's body works; its autonomic functions seem to persist whether it's inhabited or not now, but she did say that she actually died in the beginning, so did her spirit resurrect it when she went back in? By now, her body would certainly be rotting if it were dead, but how can a dead ghost reanimate a body so that it has the complete semblance of life, including warmth and freshness?