Fina? NO!!! Not for females. Winny isn't a good choice either from what I've heard from some women. I'll copy this to the womens board for you. I'm sure one of those ladies (or guys) can help ya out more than myself.
Fina will make her more hung than you! In less that is cool with you I would keep it away from her! The Winny though would be cool. My girl has used winny for years. Her Clit grew a little but we are in agreement that this is a good thing!!! Start with 2.5mg to make sure she tolerates it, then up it to 5mgs. Keep an eye and ear (her voice) on things and take it from there.
This is gettin' funnier with each post!
But in all seriousness bro I can't believe you're serious about the Fina but even the Winny can have some nasty and irreversible effects on some women, with virilization being reported after relatively small doses!