Have been chatting with this girl for some time now. So today she told me she had broken her leg and was telling me how horrible it is. I told her 'look on bright side, now everyone(in her house) is her butler'. Then this happens :

She : I'd like to hear your voice. Can you call me now?

Me : I'm not sure I can talk tonight.

She : I really think we should talk tonight.

Me : Why?

She : Because!

Me : That's not a reason, that's you being spoiled.

She : But my leg!!!

Me : I'm not your butler

She : But my leeeeeggg!

Me : You know what? I might have talked to you tonight, but since you're trying to manipulate me into it, I'm not. Have a good night!

She : I was just messing with you! It's just that I really like hearing your voice. I'm sorry! Ugh. Sorry. I'll talk to you later.

She always initiates contact and I know she will talk to me tomorrow first. I don't want to be still upset at her over this incident, but then again I don't want her to think I've completely forgotten about it either. What do I do?