OLCI gives you the option to save boarding passes as a pdf.

So, you OLCI both, print your BP and email the pdf boarding pass to herself, otherwise you could OLCI herself and select pick up BP at aoirport.

Long and shorts you check in the both of you, but OLCI allows different BP, print, save collect options per pax.

Also, it allows you to specify "0" checked bags for you and regrettably only up to "3" for the princess.