Tell her that Bella is a thousand times prettier than her.
Tell her that Emmett has a tattoo of Bella on his back.
Tell her Jacob has imprinted on her.
Ask her if Jasper and her are supposed to be twins, why is he better looking?
Follow her around all day when she asks what are you doing, say "I'm trying to figure out how a vampire could be so freaking ugly.
Walk in on her and emmett then sit between them and start reading a bedtime story.
cut her hair off while she is sleeping.
Say you are pregnant even if you are not...then tell her that the dad is Emmett
Break all the mirrors in her room, then tell her that her face did it.
Tell her emmett insists she lose some weight.
Tell her that she sucks at baseball.
tell her its so much cooler being a human than a vampire.