Is it normal that me and my cousin did it?

One time, while my cousin was visiting my house, she started walking around naked when nobody but us two were around. She's really hot and has blonde hair and brown eyes and I would always get and erection when she did this. I tried to pretend not to notice, like I would suddenly start watching TV but she would walk in front without any clothes. Sometimes she would rub her leg aginst my thigh near my penis and pretend to fall asleep against my shoulder with my arm between her breasts. I didn't really object because I liked it a little. One time, I was walking past the guest room and I heard her calling for me. I entered and she was on the bed wearing nothing but panties and a bra. She motioned me forward and I stepped forward a bit. She told me to sit down and I did. We made out, and eventually we had no clothes. I was about to do her, and she said it was wrong and apologized. I began to put my clothes back on when she called me back and made out again. This time she started to rub her vagina against my penis and she laid me down. She hovered a bit over my penis and finally put it in her. Then we did it together, and it didn't stop there. We've been doing this every day she comes, ever since. Is this normal?