Marriott app check in

Still getting use to marriot app for check ins etc etc. Used it twice and once had no problems other time I had to still go to front desk. I'll be out on business for travel but my wife will be checking in for me to meet up later. Of course my name is on the Marriott membership for points night etc etc. So will it be a problem with her not technically on the reservation even though 2 adults checking in since my name is the membership name? Also would checking in via app be better and helpful? Thanks for the help 🙂 also just hit gold for this year with the past promo.

Edit: Just called and was able to add her with no problems even though it's with points. Thanks everyone.