K.S.
Hi living in Florida I understand the importance and tradition of the Qunicianera. I feel horrible that your sister is having to deal with this. I'm sure she is very sad. Dont' understand why the aunt didn't try to do a dual one so both can celebrate. Well you can go about it two ways do a small party and get invitations out prior to the cousin. Obviously the aunt was not thinking of your sisters feelings. I would honestly not go and just spend the day trying to cheer your sister up. But becareful of the family dynamnics.