Sent the wrong package

A few months ago I sent the wrong package to a buyer. She ordered a blanket that was about $50. I accidentally sent her a $200 blanket. I immediately realized my mistake and said I would send the correct one to her and I was truly sorry for this mistake and for any inconvenience it may have caused. I said feel free to keep the other blanket or give to someone else. She writes back and just says thanks for letting me know. I didn’t ask for the blanket to be returned but would you have? She didn’t leave positive feedback either. Maybe she was annoyed.