"Me left alone in the world and mother's place"

Mother's Place

Yuna is a teenage girl who just lost her mother and stepfather in a car accident. Without giving her time to mourn for them, suddenly, the elders of the stepfather's family claim that Yuna's mother can't be buried next to him since she's not their family member. Even her sister and brother don't take issue with their decision. Yuna believes all along that they were all a family but now, it looks like they aren't. If the mother's place isn't next to her husband, where should it be?