Linking MDE accounts

[Gabriel&Nana]

Only a few days to go

I accepted the invitation of a friend over the MDE and now we are "linked".

We did this to share my Memory Maker purchase only.

But now I can change / delete their FP+ and she can do the same with mine (and the other 5 in my family).

We are afraid of accidentally changing something ...

Is there a way to be linked to share the MMaker but not the ability to change FP+ ?

TIA