My niece has always been very attached to me. Maybe it's because my brother and his wife were busy and often came to my house in the neighborhood. I noticed her growing up when she was about to start school. I think I started to see her as a woman from then on. During spring break, my niece watched an adult video on my smartphone. I knew it was a bad idea, but... I crossed the line with my niece, who was interested in sex. To kill time, I made her squirt with fingering, made her cum with toys, and did it without a condom. We didn't have romantic feelings for each other, and we continued our physical relationship out of curiosity.