I will try to explain this scenario as best as I can....hope someone can follow and help me out

My MOH works at a salon. Her good friend is a hair stylist there. I have known her friend for years through things I have done with my MOH (parties we have been too, other weddings, gatherings, etc). I asked my MOH if I should ask this friend to do my hair and make-up for my wedding. Well she thought I should and she asked her for me. (This was probably mistake and may have caused part of this problem) I guess the 2 of them discussed details and assumed that she would come to the wedding location to do my hair/make-up since its 45 min from the salon.
I ended up seeing this friend last week at an event. When she was introducing her husband to my fiance she said, "she asked me to do her hair for her wedding, so WE will be going to her wedding in may!"
So there lies the issue.....
We have a budget for this wedding and I wasn't planning on inviting her (or her husband for that matter) to the wedding. I would definitely pay her extra for driving 45 min. to do my hair/makeup, but I wasn't planning on inviting her to the wedding.
Am I wrong? Should I be inviting her? And her husband? She would be there for hours before the wedding- what would her husband do??
At the moment she made this comment I did not know what to say...
Therefore, if I don't have to invite her, how should I go about this?
Thanks for the help!