Mean

I was in a bar waiting for a friend when two ugly women sat next beside me.  When our eyes met, they gave me a smile.  I smiled back out of courtesy.  I wasn't in the mood to have a conversation not because they're unattractive, but my friend was horribly late.  One of the women tried to start a conversation.  I wanted to be left alone with my beer so I asked, "are you sisters?"  Was I mean?