Courage
Her eyes flashed with determination, the decision made in a spilt second. Her arms unwilling dropped her child, her baby -- her flesh and blood, into the crib, her arms spread out wide across the crib.
Well, Voldermort though sourly, at least the mudblood had courage.
Avada Kedavra,
and her body dropped lifeless to the ground, her eyes glazed over, her fists held tight against her side.
Lily Potter was dead, and protecting Harry was her last brave act.