Because she's such a bad loser?
She's currently have a massive temper tantrum stampeding about shouting "its not fair" "I'll never play with you again" "I'll throw myself down the stairs if you win again" "you're the meanest mummy in the world"
I didn't mean to win at Uno extreme it was just difficult not to short of cheating. she's 7 by the way not a toddler.