Thank you all for your kind words and suggestions.
Basically how it went down was like this:
My preceptor was with me everytime I gave report, sort of as a standby in case I missed anything, but I was running the show. I was always surprised that she never stepped in, but chalked it up to one of those "learning experience" things and went on my way.
Yesterday was my last day of my clinical practicum. My preceptor asked me, "Did that nurse intimidate you?" And I answered honestly, "Yes, she did."
I was expecting to get another, "You'll have to grow thicker skin" lecture, but what my preceptor said caught me by surprise. She said she admired me for the way I dealt with the situation professionally, and that if it were her, she would have said something rude back and it would have been a mess. And that is why she didn't step in. Because I was handling the situation exactly how I should handle it, without being nasty right back.
Anyway, that gave me the warm fuzzies.