Maybe she just thought you needed a haircut, and offered to do it. Girls like to play with hair.
I offered a male friend to shave his head, as I noticed it was getting a bit shaggy, and IMO it looked good shaved, so I offered, and he reacted the same way that you mentioned, and thought I was trying to control him. I didn't say "you MUST let me shave your head now" whilst hypnotizing him with a chicken...I just said that I would shave his head if he wanted it shaved. I wasn't there, so I don't know how she approached it with you...maybe she was just bored...working can do that