There was a Houuri class for 1e many years ago that might give inspiration for the theme you are looking for.
You can also have some components placed or hidden around the room ahead of time. It may be interesting to have her move to a table to open a false knob on a chair to retrieve something.
Yeah, I think in terms of D&D, this is not really a natural fit for a wizard type deal. Their magic is literally by the book. Apart from the acknowledgement of using a focus instead of material components, they still have to speak the spell clearly. It seems like a better fit for for more spontaneous casters. You already have a form of sorcery meta-magic to cast a subtle spell or you could have a variant bardic performance from a sub-class. You could potentially have feat that lets you cast a spell in a less obvious way (e.g. performance or deception roll) but presumably it would have to be limited to avoid stepping in the sorcerer's toes.This is really a thought experiment: a powerful mage out for a night on the town. If I wanted a seductress, I think I might still have the copy of White Dwarf or Dragon in which the Houri first appeared. I do have a copy of the Dragon with the original (pre-AD&D and definitely not PG) Witch class.I would have thought that any wizard worth their salt would give some weight to spells that are castable in a scrape or in extremis and thus might not require or have easily concealable components.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.