Have you now blocked the sister and really anyone else associated with this woman?
Blocked my ex's Facebook account.
Blocked my ex's second Facebook account.
Blocked my ex's third Facebook account.
Blocked her sister's Facebook account.
Blocked her sister's second Facebook account.
Blocked her dad's Facebook account.
Blocked my ex on Instagram.
Blocked my ex on Twitter.
Somehow I forsee this triggering feelings of abandonment or whatever and some sort of contact attempt.