For Sandra, getting cheated on for the first time by her boyfriend was maybe partly her fault. But getting cheated on for the second time is more than enough and definitely his fault.
Determined to redeem her pride and compensate for her pains, Sandra took on the revenge herself, deciding on the fate of her ex-boyfriend's life. Aiden MacNeil is a cheater and a cheater doesn't deserve to live.
But things didn't turn out the way she expected. Her world spun upside-down when assumptions were proven wrong and decisions cannot be retracted. She may have cast a stone against the wrong person and it was too late to take it back.