Kiputytto was indeed briefly the lover of Bane, but their time together ended when she realized he was trying (vainly, though he did weaken her, which is what aroused her suspicions) to work magic on her to steal her divine powers during their couplings.
Their clergies told different versions of the relationship, and as it was both fleeting and private, likely only have what the deities said, plus priestly embroiderment, to go on.
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