You're shooting portraits. The key part is making sure the subject is lit with the correct colour temperature. The easiest way to do this is to give her a grey card to hold and either set a custom white balance in the camera by taking a picture of the greycard (in situ while, she's holding it, in the spot and lighting you'll be taking a photo of her), or just do a wider angle shot ignoring whitebalance and shootin RAW.
I go for the latter option. Every time the location / lighting changes the subjects get to hold the white balance card again for the first shot. Then when I'm in the post processing stage I look for the cards. I do a custom white balance from each card, and then select all photos in the groups between the cards and copy the white balance settings across. That keeps it situational, consistent, and accurate.