With that one slap, Kevin suddenly understood why his sister let him spank her so hard. Dawn had slapped his ass before, but it had always been when he was f*****g her. Although the sting seemed to add to the stimulation, it had never been the sole source and focus of that stimulation. His aunt's slap-much harder than his sister's ever were-was completely different! Following immediately after the shock of the smack was what felt like an electric charge that seemed to shoot right out to the head of his c**k. Even while his ass cheek progressed from sharp sting to lingering burn, he willingly did as he was told, and stuck his ass back out, anticipating-and actually wanting-another smack. But instead, Vickie traced her fingers lightly over the spot she had just slapped, which was already

