The Secret Candy Hoard

Ever since I found out my little sister has been sneaking candy from our dad's stash in his desk drawer, I've been keeping a secret hoard of my own. It started as just one piece to see if she'd notice it was gone, but now I have an entire bag under my bed that I'm terrified will be discovered any day now. Last week, when Mom came into my room with those eyes, knowing, judging eyes, I almost confessed, but then she left and the moment passed. Now every time she walks by my door, or if there's a slight sound in her step, I get this knot of guilt and fear in my stomach. How long can I keep up this candy deception? And why am I still doing it when I know it's wrong?