Protecting their young is every animal's instinct. Even if his son wants to eat him, he'd let it happen willingly. If you lay a hand on his son, he'll never forgive you, even as a ghost!
My neighbor, Grandma He, died. She treated me like her own grandson from the time I was little. The villagers all thought she'd died of old age, but I was the only one who knew she'd been tormented to death by her own grandson, Gou Erdan! Before she died, Grandma He begged me not to expose him and gave me an iron thumb ring to keep her secret.
But in the end, I couldn't hold it in. I told someone else, and that very night, Grandma He really did crawl out of her grave…