Each person in your family does not need a separate My Disney Experience account but should be included on your account for easy planning. If you need to add your spouse or kids, sign into your My Disney Experience account. Choose Family & Friends then go to the bottom where you have the option to Add a Guest.
Make sure that both of you have your own My Disney Experience accounts, have downloaded the My Disney Experience mobile app, and have connected with each other (ensuring that you are sharing plans). This will allow both of you to make reservations from your individual devices and accounts for your travel party.
Spouses/domestic partners may use their Spouse/Domestic Partner Pass to admit Guests into the parks with or without the presence of the Employee or Retiree. Spouses/domestic partners may not admit themselves into an eligible Disney Theme Park after the Employee or Retiree has already entered the park with Guest(s).