My Sister's Thumb

I thought I'd moved past my visceral disgust with my abusive mother years ago. Then I saw my sister's arched and ambitious thumb holding a decorative bowl of food in a snapshot. One look and it all came flooding back to me. My sister's thumb triggered the visceral disgust. Why? Perhaps the thumb is the face of the hand and now my sister's thumb embodied the face of my mother. So my reaction was as if I was seeing my mother's hands again, the very hands that abused me.