ME: I paid my sister's university fees for three years. When she finally graduated and got a high-paying job, she told our family I had never done anything for her. It started when Dad lost his job. My younger sister, Vanessa, was in her second year of university, and our parents couldn't afford her tuition. One evening, she called me crying. Vanessa: "Please, don't let me drop out. I've worked too hard to get here." ME: "You're not dropping out. I'll figure something out." I was earning barely enough to support myself, but I took extra shifts and stopped buying things I needed. When her rent was due, I sent money. When she needed a laptop, I bought one on credit. When she called at midnight because she had no money for food, I transferred what I had left. My friends told me I was doing too much. ME: "She's my sister. Once she graduates and gets a job, things will get easier for both of us." Four years later, Vanessa graduated with honors. I cried when she walked across the stage. I thought all those sacrifices had finally meant something. I had no idea what was coming.