How would you react if you gift your partner a dress and his/her cousin borrowed it but not giving it back?

she said that her cousin is not giving it back. But what worries me is.. I guess if it was that special to her, she would have kept on asking for it. It’s not expensive or rare, but still you know..its a gift from beloved!

I gifted that one an year back and recently I gifted another expensive dress. Her cousin borrowed that one last week. I don’t know if she would give it back.

what would you do/say in this situation?

How would you react if you gift your partner a dress and his/her cousin borrowed it but not giving it back?
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