My niece suddenly came to my dingy one-room apartment. She decided to clean up my room, which was too dirty! But when I saw her no-bra nipples and panty shots, I got a full erection, even though I thought it was inappropriate! I couldn't hide my erection, and my niece was curious? She said, "It's okay if it's with you, uncle," and we got closer! I shouldn't make a move! The other person is my niece! I tried to suppress my desire, but my niece's erotic charm was too attractive... In the end, I couldn't hold back...