It might be a nice thing to emphasize the relationship if a person addresses one´s own dominant partner in direct communication.

Writing like this no matter where and in general conversation gives me eye cancer.

Just my opinion, though.

Someone on another forum wrote something I really liked:
"Orthography is freeware, that means you are allowed to use it for free.
But it is not open-source, which means you are not allowed to make changes to it as you please."