Offended about being referred to as a guest

[Ivenamechange]

I don't know if I am or if my mother is?
Basically what the title says.
I referred to mother as a guest in my home today. She was highly offended and said that as my mother she should not be referred to that way and that a friend is a guest etc.
I didn't mean any harm by it I only meant that if you are somebody else other than the people who live in the house I'd class them as a guest. The more I tried to explain this to her, the more offended she got.

Prehaps I was wrong?

Sorry if this isn't worded well, I'm a little upset and can't ask anybody IRL as it will get back to her and I don't want to cause more of an arguement.

@Anordinarymum

She's your mother not a guest. I would be annoyed as well if my daughter said that. It removes something from a close and special relationship by referring to a loved one as a guest. What nonsense.

This^

I understand both sides,by calling her a guest,she sees it as you are saying she's not family,a friend coming to tea,a sales person come to talk to you would be a guest in your home😏
It's entirely how you hear the word and define it.

I'm surprised how many people think the terms family and guest are mutually exclusive. My family members are guests unless they live here. It's like some family members are children and some family members like cycling. Some (most) family members are guests when they are in my house.