OP here.
I'm about to jump in the shower and head down to meet her at her work. Then we are going to go to the sex shop and pick out her new toy. I have had a hard on almost all day since I woke up just thinking about this trip and what could happen. Mainly because I think I'm going to tell her to take it out and use it on herself while we drive around. I have a feeling she might fight me a little bit because its so public, but then again she's been telling me she likes to submit and do as she's told. She said she went and shopped around for a little while a few days ago and she really wants an egg vibrator. I may just get her one and a nice big dildo to go with it.
Gotta go! Will post an update as soon as I get home.