ترجمه‌ی عبارت Letting it out means making it bigger در جمله‌ی زیر

Man: Did you make it?
Woman: No, I wish I had. No it wasn’t made by me. It was made by my sister. Oh, I’m just letting it out.
Man: Letting it out? Where?
Woman: No. Letting it out means making it bigger. So it’ll fit my mother.