You'll have no problem with her logging into her account once you've logged out. The game won't let you guys play together until you get an IP exemption anyway, so you are in no danger
[You must be logged in to view images. Log in or Register.]. I've got an IP exemption for my wife and I as well. Just be forewarned...it might take a while for them to get to your request. And that isn't a jab at them by any means, it is just that this is all done via volunteers, which means sometimes it might take a bit.