I donated the sweater my aunt knitted. Now she wants to make me a matching cardigan

My aunt laid a new ball of the same mustard yarn on the table and said, 'A cardigan would go beautifully with your sweater.'

The sweater went into a donation bag eight months ago. She made it for me two years before that. I wore it once for a photograph and told her I loved it. I loved that she'd spent her evenings making something for me. I didn't love the high neck or the enormous sleeves, and it lived at the bottom of a drawer.

When I cleared the drawer, I decided somebody might actually wear it. I also decided that was the end of the problem. I never said I'd donated it.

Now she has a knitting pattern ready. She seemed pleased to have another project for me, and I managed to say, 'Let me think about the colour.' So she currently believes the only obstacle is mustard.

I don't want to accept months more work for clothes I won't wear. But telling her the sweater is gone feels cruel, especially when I kept calling it lovely. How much of that truth belongs in this conversation? And is there a way to decline the cardigan that doesn't leave her planning the next matching piece?