In the Extremely Cold Apocalypse, the Love-Minded Sister-In-Law Kills the Whole Family

My sister-in-law is a lover. When the extreme cold apocalypse came, I took the whole family to buy supplies and told her not to tell anyone about this. She turned around and told her boyfriend. Later, our family hid in the safe house and lived carefully, but my sister-in-law made a fuss about sending supplies to her boyfriend's family. I advised her to take care of herself first when the apocalypse comes. We don't know when the apocalypse will end, so we can't give it away casually. But my sister-in-law cried and said that I had a small belly and could not see her happy. She also said that if her boyfriend died, she would not be able to live anymore. My parents-in-law called me a house spoiler, gave the down jacket I prepared to my sister-in-law's boyfriend, and kicked me out of the house to reflect on myself. I was frozen into ice and died without a look in my eyes, but my husband and his family managed to survive until the end by relying on the supplies I had hoarded. When I open my eyes again, I go back to a few days before the end of the world.