I think what Aileh was talking about is that Kaz, being so twisted by the corruption, gets herself constantly tangled up by her most base emotions, which for all intents and purposes makes her incapable of a pure/selfless kind of love and leaves her with one that's all boggled down by lust, possessiveness, and all that.
Which, cool idea, but do i personally think it fits with the Kaz we know? Not really. If there was ever a chance for her to act out it was during the Aileh pregnancy, what with the multiple counts of cucking she had to endure there, yet all she does is be supportive and caring (towards her daughter and main lover who basically went behind her back and are having a kid before she can). Not really the reaction of a being that's selfish at her core, in my opinion.
Maybe she was all fucked up before meeting the Champion and when raising Aileh, dunno, but to this day i'd say that kinda description fits much better Keros and all them other gods than it does her.