When Requesting Same IP Access...

[Cyclone]

If you do not log onto your account while her's is running then no, however if you boot up while she is online both of you could get banned outright.

[EnnoiaII]

You can't log in 2 accounts from the same IP without the exemption. If you try logging in a second account it will say the IP is temporarily blocked. She can create an account, make a character and even play whenever you aren't already logged in.