I believe you didn't give her much. I don't think they need much to assuage their guilt and anxiety. Just you having a friendly moment with her probably meant something to her. I am continually amazed at their oblivious nerve, asking us about our life, and trying to have these little friendly moments. My W tries to do it all the time. The R is skewed and unnatural. I never ask her about her life, so why does she keep asking about mine? The only answer is she is trying to manipulate me to reduce her anxiety.
I don't consider it sulking like a baby. I've just finally come to the conclusion that someone who hurt me and my kids like that, and continues to do so, does not deserve a R with me, at all. Anyone else who hurt my kids like that would be my enemy, so she actually is getting special consideration. I'm not mean, or vindictive, or even cold. I just treat her like a business associate I don't much care for. Just business, nothing more.
