I was asked by my sister to take care of my niece for a few days because of a sudden business trip. The niece I met after several years had grown into a cute, serious-looking black-haired beauty. However, the moment we were alone, she deliberately teased me with her fair, big-assed panty flash. No... the other person is my niece... she's my niece, I tried to calm myself, but my cock was uncontrollable and I had an involuntary erection. To maintain adult dignity, I rubbed my cock on her panties and cummed on her! Taking advantage of the gap when my niece was confused by the sudden semen cumming, I inserted her and punished her with a piston!! Without letting her say anything, I made her cum repeatedly and made her understand! Until my niece changed her attitude, I cummed on her panties repeatedly and creampied her many times!