I was the first to make a move. I loved my son so much that we had sex just once. Of course, we had intended to leave it at that. But neither of us could forget about that day, and we continued to have sex many times, hiding it from my husband... Eventually, my son began to want to have sex with me even when my husband was nearby. I tried to scold him, not wanting my husband to find out, but my vagina became soaking wet just from his caressing while sensing my husband's presence...