DD has had a friend to stay who was a bit upset at bedtime. DD very upset by fact that I was cuddling friend and trying to cheer her up. DD seemed jealous - that's OK - but then became very sad saying that I didn't love her and liked other child better than her. DD also wanted to do exact opposite of friend just to see which I'd choose I think and then all sad again. This is first time someone has stayed over with her but she has stayed over with them and been fine. Anyone got any ideas on how I can reassure DD without ignoring upset child???