Nothing its just a sign of ignoring like a one word reply
Please don't make assumptions and read too much into a single reply and interpret it as some kind of 10000 word manifesto. Give her the benefit of the doubt. If she's in fact ignoring you or somewhat perturbed by what she thinks you're saying or doing, it's up to her to explain thusly. Remember that she has a life beyond chatting. Maybe she has other issues that somehow managed to influence (temporarily or otherwise) this SOLITARY post and nothing else.
Treat her with respect. Take the obvious high road. If she's a good person, you'll might get along and keep this thing going. If not? You're the better person in the equation.