Would she like someone magically in love with her?
I don't see why not. For people who see the love of another as validation, or who are simply too busy lusting to think, I'm not sure they'd care. (See the look on Zara's face in strip 1861.) Besides, people have a remarkable capacity for self-deception. I think it would take Zara all of about 10 seconds to convince herself that her intrinsic hotness was what was addling Lucas' mind.
Small problem of the fact that if she does anything with him in this condition it's rape, no wiggle room as she's now fully aware he's not in control of himself.
Hmm... I suspect you've mistaken Zara for an adult with an understanding (or even interest) of the intricacies of modern sexual assault law, as opposed to a lovestruck teenager, who sees the chance to prove that she's worthy of being loved.
And that's a bit of a heavy burden to place on the child. Unlike actual "love" (depending, of course, on your understanding of what love is), infatuation is inherently selfish. Now while it wouldn't surprise me if Zara's infatuation lead her into an act of self-sacrifice on Lucas behalf, its main goal is to make Zara
happy*, in that it wants Lucas' love as proof of self-worth. And I suspect that a little hot flaming weasel sex would do the job just as well.
* Note that this does not mean that Zara is unconcerned with Lucas' happiness. But the norm in such cases is that Lucas' happiness is assumed.