So agree with Abuela plus ......... tell her You lost them! Must run in the family.I agree with my 'cuz. If the gifts from her to your mom are of value sell the jewelry, if not gift the lot to a senior center as we know from Lalande grifts costume jewelry is much coveted. When my mom passed we gave an enormous amount of clothing and costume jewelry to Goodwill to share with others
What your Aunty is doing is not right and not caring. Once you give in and do this ....... watch, she will want More from you. Nip it in the bud!
You are not awful - your Aunt is.