Not in your User Account, you have to use another(new) account to even use another (iCloud) account, and then you might be able to do so.
Edit, if you create a new User Account you can then import her Home Folder.
At first I misread your question, at first I thought you meant an AppleID or iCloud but you just want to create a new User, if you create the new User it should have exactly the same name and password as her backup, not only that, you might run into problems with permissions.
For instance, on your MBP there is one account and also on her MB, this means both Users ID is 501, now if you create a second User on your machine her ID will be 502 while on the backup it is 501.
The best way to avoid conflicts is to copy it "manually" when it is logged into the new account since all copied files will have their permissions set right.