Nancy's mom was very mean to her all of her life.  Near the end of her life, she asked Nancy, "Why do you take care of me?" Nancy said, "Because I love you." However, Nancy wasn't so sure if she really meant it.

Bible verses: 
"For if you forgive others for their transgressions, your heavenly Father will also forgive you. But if you do not forgive others, then your Father will not forgive your transgressions." (Matthew 6:14-15, NASB)

"Whenever you stand praying, forgive, if you have anything against anyone, so that your Father who is in heaven will also forgive you your transgressions. 26[But if you do not forgive, neither will your Father who is in heaven forgive your transgressions."]" (Mark 11:25-26, NASB)

"Therefore from now on we recognize no one according to the flesh; even though we have known Christ according to the flesh, yet now we know Him in this way no longer. Therefore if anyone is in Christ, he is a new creature; the old things passed away; behold, new things have come. Now all these things are from God, who reconciled us to Himself through Christ and gave us the ministry of reconciliation, namely, that God was in Christ reconciling the world to Himself, not counting their trespasses against them, and He has committed to us the word of reconciliation. " (2 Corinthians 5:16-19, NASB)