AITA for telling her she is an AH for expecting me to always be understanding

So a few months ago I started dating this girl, let’s call her Karen.<br><br>I told her I don’t want to have kids.<br><br>She told me “cmon, we’ll have kids together, it’ll be great”<br><br>I said no.<br><br>We had an argument, but we still went out.<br><br>Things have been great.<br><br>The other day she told me she bought a baby carrier.<br><br>I asked why<br><br>She said “I want to come over to your place and visit our future kids”<br><br>I asked her “did you seriously expect me to have kids with you?”<br><br>She said no, she just wanted to spend the day with me.<br><br>I said “you’re a shit liar”<br><br>Now she’s pissed at me for not being understanding and I think I’m an AH for telling her straight.