I thought it was weird for the mom to release butterflies at the memorial service. You'd think she'd never want to see anything even remotely butterfly related ever again. As far as Garcia's grief group (I also wonder what her credentials are to lead something like that) when she looked at the empty chair, perhaps it meant that the mother was able to move on because she now knows what happened to Hope. And of course, that's where the trouble started with Bill, so she'd probably be too scared to go back.
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