This reminds me of my WQ character Oleander. She was best friends with the alpha, but then since there was a shortage of wolves it was said that the alpha had to choose the prettiest strongest wolf and have pups with them. They chose Oleander, and at just a year and nine months she was expecting pups, she ran away so that they would never be able to be chosen for what she had been chosen for and one of them lived. The living one killed his father and took over the pack