THIRTEEN YEARS AGO _______________________ -CHRIS- "If this triangle is acute, what is the sin of A?" Nina pointed with her pencil at my notebook, a lock of her dark, wavy hair falling over her forehead. My hand was itching to reach for it and tuck it behind her ear. She turned her gaze from the page to face me, those gorgeous forest-green eyes filled with expectation. For about a month now, she's been tutoring me after school. We've been meeting a few days a week at her house, whenever we both have free time. Some days we study in the living room, others, like today, in the kitchen. Never in her bedroom, as her strict father made it clear from my first visit. I love their kitchen. It is the heart of the house with wooden cabinets and deep green tiles on the backsplash wall. In the mi

