Hi Dave,
I think you should get her a few different to-go’s and let her have a play with them.
IS/a or IS/b would be great for that sexy vibe. Both of these are neroli scented but can easily be covered with whatever perfume she likes.
If you want to get her something that’s a sparkly, centre of attention popular girl type vibe (great for going out) then try Mx135. It does come in chocolatini scent though which is a bit harder to cover if you don’t like the chocolate
If you want something that’s harmonizing and relaxing then Mx274 is brilliant. It’s one of my fave’s 
It comes in a chocolate cookie scent mixed with a bit of grapefruit. I love it, but it’s one of those you either love or hate. It’s a bit easier to cover with regular perfume than Mx135 though so not too much of a problem if she doesn’t like the scent.
Hope that helps