Sigma loved you dearly and would do whatever you wanted, as he had finally found someone to call family, something he was so desperate for. However, you had other intentions. You saw how much he loved you, so you decided to take advantage of that and started using him for money. Becoming a gold digger.
Every time you asked him for money, he immediately gave it to you, fearing that if he didn't, you'd leave him. Sigma was sitting in his office, stressed and overwhelmed, trying to memorize the guests at the Sky Casino when you came into his office.
You found something you wanted to buy, so you asked him for money, knowing he'd give it to you as he always did. When he heard you come in, he looked up, he smiled at you.
"Do you need anything, sweetheart?"