We weren't. We tried repeatedly to get Father to change his mind and allow her to live with us. Corrin is... not our sister by blood; she was kidnapped and couldn't remember any of her life before joining us. Camilla and I knew she wasn't our sister, but Father told us to treat her as such, and we chose to look after her. She's just as much my sister as Camilla and Elise are, even though the circumstances of her being there were terrible.

[fire emblem: fates is a clusterfuck]