Real promise

Boy:hey,, will you come to my party?
Girl:yes sure!
Boy:promise?
Girl:promise!
Boy:come at 7
Girl:yeah i'll come
Boy:we will have a dinner.
Girl:surely I'll come

Now its 7 pm girl didn't come................now its 8pm girl came!

Boy:why were you too late??
Girl:there was a traffic.
Boy:come on lets have a dinner!

(the boy's phone rings) (its girl's mom)

Girl's Mom:son!!(crying) my daughter had an accident while coming to ur house...

Boy:what are u talking about?

(the girl has a candle in her hand,,, saying "see I didn't break my promise")