Daughters (фемслэш)

Iduna’s stomach churns. “Oh god.” She clenches her fists. “What have you done?”
Or:
Iduna's day keeps getting worse, and a major cause for that is something she learns about her own daughters. She struggles, and she will have to decide for herself what is most important, which compromises, which sacrifices she is willing to make.
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Just to be crystal clear about the relationship tags: the only relationship in a romantic / lover sense is between Anna and Elsa. Iduna sees them as her daughters only.