I took my friend's sister, it was her first time and quite complained, but i think she liked it, i hope

A friend told me that her little sister wanted to have sex with a man, but she is not doing well with boys. she wanted to know what he was. all of her school friends had already experienced it. he asked me if i could have sex with her, and i accepted her. we went to a hotel, my friend waited outside, but he told me to film everything. she was ashamed so we didn't take off our clothes, i gave her back and started to take her, first gently, then harder. it looked like it hurt, but i continued. after a while, she started to like it. i think next time she'll be the one to call me