I've got to book some business travel for myself tomorrow (Monday) and would like to do it on her BA card--so she can more quickly meet her 2K spend. I wanted to get myself on as an authorized user on her card, but there's no time for that.

So, my question is this:

Might I run into any trouble using her card to book my travel? I'm likely to do it on Expedia, with AA for flights and a boutique hotel (unfortunately, not one I can get any points with--but they've got the best deal). In other words, might I be required at some point to have her card for self-check in, etc? It's quite rare that I travel for business, where someone else is paying the bills (unfortunately). My employer requires me to book the the travel, and I'm reimbursed later. Great opportunity for promotional spend on her card that I don't want to pass up.