I would go to Good will or garage sales and buy a queen size bed spread or quilt to threw over the sofa. Since you don't plan on keeping the sofa I wouldn't spend a lot of money on it. My sister has cats to and she has used quilts and bedspreads on her sofa for a long time. And she has found some very nice quilts and bedspreads and has paid very little for them. And her sofa looks quite nice.