Might have still be in shock, or she was numb from having lost so many she cared about already. It looks like this group they were running from was fairly organized but something chaotic about it drove them away. So she has probably been through so much already. We see the same thing with Rick's group, there is initial grief but you have to keep moving forward.
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"In brightest day, in blackest night / No evil shall escape my sight / Let those who worship evil's might / Beware my power, Green Lantern's light!"
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