She's here to remind him about the Prohibited Matters: any injury to the guest is strictly forbidden... and under the current interpretation of the law, deflowering counts.
Not to mention, as the first Lamia in Japan, it would be a diplomatic incident!
So hands off, buster!
Miia doesn't care about the Prohibited Matters, and would fuck him right now.
Except in her excitement, she squoze him a little too hard and dislocated his shoulder. (Smith pops it back in.)
How about a date instead?
Sadly, most places are not Lamia-accessible yet.