MFT-007 - After incorrectly educating my naive younger sister, who had developed a very provocative body, she became intensely curious and started touching my penis, asking "Can I insert this?" Due to her lack of knowledge about incest, I ended up having raw intercourse without realizing it, and then began a pounding piston-like motion...! Three consecutive thrusts in a riding position without withdrawal...!! "You're already ejaculating inside me…"

My sister is somewhat lacking in sexual knowledge and is a naive woman who knows nothing about incest. When I taught her false sexual knowledge, she innocently touched my penis, and I, being aroused, pretended it was H training and did… something I shouldn't have. I felt regretful, but because I was honest about the pleasure, she greedily demanded insertion, and we ended up having incestuous sex! It felt so good that I unintentionally ejaculated inside her, and my sister, not even fearing pregnancy, continues to aggressively thrust in a riding position, and I'm doing three consecutive thrusts without withdrawing...! I wish she would just stay as my innocent, unknowing sister!