“She could research you indirectly, find your supernatural contacts, and contact them. She can be very charming.” 

"I'm - very unclear how concerned I should be about this situation, as a whole.  How bad would it be if she convinced someone to turn her; how highly should we prioritize making sure she doesn't find out enough that she'd try?"

Jaime doesn’t say ‘if I’m perceptive and paranoid enough to spot that there’s an obscured layer of enforcement on the vampiric masquerade, so is she, and she’s going to be even less cautious about stabbing it in the kidney until it bleeds to death’.

She does say -

“She wouldn’t intentionally murder more than a thousand people total during her first decade.”

".......I'm entirely unable to tell whether or not you meant that to be reassuring."

“I didn’t.”

"Okay.  So maybe we should skip visiting my cousins and instead go vacationing in regular hotels, do you think?"

Oh, is ‘vacationing’ the euphemism they’re using for it.

“Yes.”

"Anything else I should know before I tell my aunt we'll be doing this?"

“No.”

Then she will, after a few tweaks, hit send on the message she's been composing.

And in a day or two, they once again reach the point where having Hana drink from Jaime will leave her with more magic instead of just less blood.

Jaime approves of having more magic and is mostly indifferent about blood loss.

She bleeds.

The experience of gaining magic hasn't changed much since the first time, aside from the amount she's had access to, but her perception of it has.  After she's had a few times to get used to the sensation, it feels less like having her own mental state altered and more like she's reading someone else's mind.  That someone is consistenly the exact same amount of chipper about all the things she can do with magic, and that amount is a lot.

Does she want to grow fangs or change her facial features or have more space in her brain or fly or desaturate her skin or become stronger or make her posture a little more predatory by default or change her eyes to any of these several dramatic colors or develop her immune system or -

She’s curious about whether ‘directly vampire-ify faster without other alteration’ is an option, actually, she’s never tested the capacity of the system to make meta level changes.

It doesn't seem to be distinguishing between 'acquiring superficially vampire-like attributes' and 'making progress toward becoming the type of person who gains magic when they drink other people's blood'!

Do any superficially-vampiric traits seem more cost effective than others.

It's been rather chipper-er about changing the bone structure of her face and growing fangs than everything else!  It's not unambiguous confirmation, but those are the most obvious starting points.

Eh, it isn’t like there’s much harm in it.

She grows fangs.

The magic gains an element of - satisfaction, maybe, in addition to its customary ebullience, once they get to a certain length and pointiness - still passably in human range.

She still has a fair amount of magic left; does she want to keep growing them?  Adjusting the muscle memory in her mouth so she won't have a lisp is also something she could do now if she wanted!

She’ll adjust her mouth’s muscle memory and then go on to (partially?) desaturate her skin with any magic she has remaining!

Reacquiring a lack of a lisp takes barely any magic at all; she has a fair bit left over for skin desaturation.  The magic works fast enough that she can see the change; it's a little striking.  But before Hana's done drinking, Ari enters the room -

"Maybe wrap it up, guys; there's someone at the door again."

Jaime lets Hana detach, and stands.

”Who is it.”

"Haven't checked yet.  Just heard knocking; you guys were closer than the door and I wasn't super planning on inviting them in while you were," gesture.  "Probably shouldn't leave them waiting too long, though."  She starts heading for the door; Hana follows.

"Do you want me to heal that?" Hana asks in low tones as she goes.  "Just - I'd really rather avoid looking suspicious in a way that leads to having to explain more than we have to right now."

Jaime trails after them.

“Sure.”

Jaime's wound disappears in short order.  Hana has a handkerchief in a strategic shade of red on hand should she need it.

Ari makes it to the door a bit ahead of them and opens it.