I guess for me, love is relationship, and with relationship comes with a responsibility to honor, respect, support each other. In a healthy parenting relationship with a child, the child learns through modeling of those positive relationship behaviors, and there are logical consequences when one betrays another in a relationship (parent or child). That doesn't mean the love goes away -- not in a healthy relationship. It's a point of conversation, renegotiation, renewal, etc.

Some relationships are obviously not healthy at all, for a variety of reasons, and no one has to accept abusive behaviors from any other person. In extreme cases, I have seen family members have to put up very strong conditions in order to stop the abuse. My husband had to do so with his own family. The relationship was so entirely dysfunctional and abusive, that any interaction always ended up abusive in some way. He hasn't seen or interacted with any member of his family in a very, very long time. But you know what, he still loves them. He loves them deeply and the separation is painful. His love is conditional. His condition is his refusal to any longer be abused by any of them. His love is eternal though. Despite every horrible thing they've ever said or done to him, he still loves them. That has never changed.