Dear Lisa:
I am thinking, you probably told your daughter many times and made it very clear to her, over the years, how abusive your now dying sister has been to you, and how important it is to not be in contact with her. Your daughter probably witnessed how much you suffered as a result of your sister’s (and other family members’) abuse and she felt a lot of empathy for you. Her sense of justice was greatly offended by the abuse inflicted on you (and on her, directly and indirectly), and so, I understand why she feels intensely about you visiting with your sister.
My advice: let your daughter know that you are resuming the no-contact position, and that it was wrong of you to go against your word by meeting with your sister.
You already sent your sister the links you thought will be helpful and it doesn’t seem to me that there is anything you can do for her. Having had no contact with her for so many years means there is no relationship for her to lose once you resume no contact. On the other hand you do have a relationship with your daughter. Protect it and promote it.
anita