The camera returned to the cake to show that a dove's head had been chopped off, since the doves were inside and the cake wasn't meant to be hacked into. It's probably also symbolic for end of the temporary truce. The cake wasn't poisoned since everyone ate it... but only Joffrey drank that particular glass of wine.
Well, Lexi has recurred in many other episodes, with actual plotlines, so it was okay to give some other characters a chance this time.
Fully agree. And if she wasn't going to die, they shouldn't have wasted the entire episode on her sobby goodbyes, and gotten straight to the hijacking of Elena and gotten into that storyline.
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