I'm very sorry to hear of tragic turn of events leading to the loss of the budgie siblings. While Tiger is no longer with you, there is still a chance someone has rescued and given her a good home.
Rest in peace, Jasper and wherever Tiger is, I hope she is happy and well taken care of in her potential new home. If not, may Tiger rest in peace with her brother.
RIP sweet Tito (Summer 2008 - January 17th 2013).
You are missed and never will be forgotten.