AITA: For not wanting to give back a suit my sister gave away?

Am I the Asshat: For not wanting to give back a suit my sister gave away? One sister put a suit in her donation pile, the other sister took it and gave it a makeover. Now the donator sister wants it back because it looks so good? Should OP give back the suit or is it now hers? Pull directly from Reddit, it's AITA! See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.