Sue had just come once under me and we were riding toward her second orgasm when I thought I heard something. Looking around in surprise, I spotted Mindy standing in the shadows of the trees to my left. Knowing that she'd seen us fucking before…and too far gone to stop now anyway…I kept right on pounding Sue.

The naked little girl in the shadows seemed oblivious to the fact that I was staring at her. One of her hands was rubbing the nipples of her titless chest…and the other hand was between her legs. It was very obvious that Mindy was masturbating as she watched us…and it looked very much like she was fingering her own vagina in time to the thrusts of my cock into Sue's tight hole. Confused…disturbed…and definitely excited…I came to my own orgasm. I remember crying out as I felt myself soar over the top…and felt the semen ripping from my prick.

Suddenly it was over and Sue and I slumped to the grass, pulling apart and laughing as we enjoyed the after fuck glow. I looked over to where Mindy had been standing…but she was gone. Somehow it didn't seem to matter any more and I just lay there happily enjoying Sue's hands as they stroked the softening semen covered tube of my spent cock.

We left the resort about six in the evening and headed back to the city. We had played hard all weekend and the others slept while I drove. Sue was nestled against my side and the two younger girls were in the back of the station wagon. Mindy was lying on the back seat and I could just see her in the rear view mirror. We had been on the road only twenty minutes when I glanced in the mirror. Mindy had slipped on a simple shift dress at the resort for the ride home, and she was now lying there on her back with one knee up and resting against the back seat cushions. The other knee had fallen to the side so that her legs were widely parted.