A lot if TA’s will sign you up for a CC number, if you’re new to PCL.
So, Yes! Call your TA tmrw and ask if your DW has a CC number. She needs one in order to get credit for this cruise.
Then, from there you can sign in with her number and set up an account. But, definitely make sure you don’t reregister her. Or, you’ll have issues.
The TA should have used your legal names that match your passport.