Her Protocol

I know a straight couple.  I asked the man, on a whim, to join me, with friends, out on the town.

The woman became quite angry.  Her protocol was that I should have asked her prior to asking him.

Her protocol varies from mine...which is to talk directly to the person and if a person is in a relationship then it up to that person to discuss it with the partner...

Am I only one that thinks this way...?