As an insight into the effect of guilt on mental health, this works very well. It's really not comfortable being behind Ren's eyes. Her anxiety and her compulsive behaviour, brought on by the lie she's created, have left her isolated, despairing and on the edge of hating herself.
Capturing this in any novel is an achievement. Wrapping it in a novel of planetary colonisation that is more a pilgrimage to meet God, is extraordinary. Placing a seed of betrayal and deception at the heart of everything and revealing it slowly, like a dead body you can smell but can't yet see, is inspired.
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