It seems like you know way too few facts. For all you know, she's a relative that comes over and helps out Granny and the 40 year-old. Why not engage Granny in conversation and ask her who the girl is?

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If this is going to be a Christian nation that doesn't help the poor, either we have to pretend that Jesus was just as selfish as we are, or we've got to acknowledge that He commanded us to love the poor and serve the needy without condition, and then admit that we just don't want to do it.

- Stephen Colbert.