How to turn off iMessage from other Family units?

I just updated my iPhone and after I had unchecked the boxes saying to not allow other devices in this family account to use my iMessage but now I just started getting pictures like this right and I tried to start using my phone and I'd like to know how I can turn it off How to turn off iMessage from other Family units

Go onto Catherine's phone then go to settings --> messages --> send and receive then uncheck the numbers that you don't want sending and receiving messages that you would get.

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