LW1:  I agree with notanymore. I understand that you are grieving for your childhood and family memories, and it would be nice if your sister held an annual family reunion at no charge (as I would do), but she is not obliged to do so. A vacation house is a big expense (as ksoksdca comments), and different from inviting sibs to dinner at home. Please get over your grief, and remain cordial with your mingy sister, for everyone's sake.