Apology
If Ana Lucia could have considered her life after her untimely death (which eventually she did), she would have been grateful for two things. The first was that she had called her mother. It hadn't been a perfect reconciliation, but at least it was an overture her mother could hold on to. The other was that she had apologized to Sayid for the worst thing she had ever done. Whether or not he forgave her was no longer important. She had apologized.
She had never been one to waste opportunities. Sometimes that had worked out badly, but not this time.