My sister holds a deep, profound and malicious grudge against me because I no longer allow her to use and abuse me. She believes that, as her sister, it's my duty to be at her beck and call. She will very likely hold that grudge till the day I die and beyond. But then, she treats everyone that way until they abandon her.
I suppose it should be me who forgives her. The circumstances of her childhood were far worse than mine because she was two and a half years younger, more vulnerable and less able to understand.