horrible attitudes

there is a particular individual that always has an attitude in the morning when she is given report to. every morning is the same thing, always with a horrible mean look on her face, not one 'hi' or 'goodmorning'...... sometimes I feel incompetent next to her.. anyways, I casually had a converstation about her, that I dislike giving report to her about the attitude--- and one person in the group who I was talking to brought it to the manager. this morning after doing report, I was sent to the managers office, with the clinical nurse specialist, manager and charge nurse--- They were asking me, why I like floating to other units, and then they said, is it a particular person, and mention the nurses name who gives me attitude in the morning-- and there I am telling them, that i don't hate her, I just dislike the attitude-- and I like floating to other units to see different kinds of patients.
I feel very upset over the situation, to the fact that i could not sleep tranquilly at all when I came home. I feel that it is so petty of the management team to come to me about something I said so casually in a conversation and did not meant it to be a big deal. I happen to give report to this particular nurse every week-- this particular nurse knows I dislike this nurse, but i end up giving report to her--- never have i asked to have the assignment changed for my liking. since I like floating, they offered me to 'look into' possibly me going to the float pool. which is something that i do not want to do, because most of my coworkers are very cool and i like them.
just venting! needed to get it out!