Never watched Dexter, but IMO Jolene has once again been very measured (which is the opposite of crazy) in her response. She used her one advantage (physical capability) to completely shut down Hesha's momentum, then backed off and explained exactly what that retribution was for. Note that Hesha does not carry any ill will against Jolene for biting her, because she seems to have accepted that the bite was a consequence of her own actions. Again, I am not saying that Jolene is not a sociopath, but if she is, she is a very high-functioning one.
A normal person does not bite people just because they're upset at them; if anything, the fact that she felt the impulse to bite her rather than something more mundane like slap her makes it much more abnormal behaviour that most people wouldn't even have considered.
She reads a lot like Dexter is intended to be; a sociopath with violent impulses that they keep in check through adhering to a strict set of rules about what's "proper" both in order to be a functional member of society and so that their violence only comes out towards targets deemed "acceptable."
Specifically, the way she speaks about- and treated "being naughty" towards Hesha implies that she has these thoughts and urges of violence normally, and usually she doesn't act on them because she's come to believe they're "naughty" but in the same way that Dexter has no reservations going after someone who's a "killer" Jolene has no reservations "being naughty" towards someone who has also been "naughty."
Yeah, I can agree with all of the above. Still, the amount of self-control you describe, especially if she does have to restrain her "naughty" impulses at all times, is remarkable.
Also, I don't think that a slap would work, since slaps are still part of the regular "courtly" (for lack of a better term) contexts that Hesha is used to. I think Jolene has bitten her not only because of her impulses, but also because a bite would be so far outside Hesha's normal context, it would flip the power dynamic between them on its head instantly, without giving her any chance to respond. What I am saying is, she knows she could make things much, much worse for Hesha, but repeatedly stops herself in order to deescalate, and Hesha is too myopic to realize she is playing with chemical fire.