people compartmentalize things.
I use to wonder how my mother could pick a man over her kids,how she could send us away when we got in the way- i'm older and now I know she re-writes history.
In her mind my grandparents made her give me to them rather than she wanted her new husband more than me.
The human mind is a master trickster, it will protect you from yourself.
(by the way while she was a horrible mother, someone who should never of had kids really - she is a Wonderful grandmother)
Are you and I sisters?