MDE qu

I have always been the one in our family to control all things MDE, including FPP. However, DH and I may split up with the kiddos at a park for a few hours. If I want to allow him to separately look for same day FPP for him and one of the kids, is that done simply by him also using the exact same account (my login and password) on MDE on his phone and just selecting him and one kid when choosing FPPs? I know that he is permitted to have his own account, but to keep things simple is there any reason he can’t use mine (i.e. both of us using the same MDE account on different phones)?