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Alternate Character Interpretation - Irena is apparently considered clingy and jealous for being bothered by her husband confiding personal things about their marriage to his American co-worker Alice. Since her husband ends up leaving her for Alice, it actually seemed rather sensible of her to be worried.
He didn't so much leave her as she turned into a panther and went into display at the zoo.
But he decided to divorce her before that happened.
He also confided with Alice about his sex life with Irena while they're still married.