Lifting your leg from the water, I gently grip the muscles of your thigh, squeezing sightly as I run my hands along their length, across your knee and...down to your calf. I reverse the action, taking care along the whole length of your limb, enjoying the firmness of your muscles beneath your skin. When at your groin I allow my index finger and thumb to circle the grove there; the narrow channel of flesh that separates your leg from your beautiful, supple cunt. I take care not to touch you there;. Instead, I built up my forces in Australia and sat quietly, fighting an erection at one moment, and dreaming of my mouth wrapped around my sister's sweet tits at another. It was becoming too much to bear, I had to excuse myself again."Be right back..." I leapt up the stairs and locked myself in the bathroom, staring at the mirror and trying to compose myself. Sure, she's attractive, I thought, but you can't pop a boner in front of her! Ok... ok, calm down, no harm was done... it's not like she. Even worse, improperly placed latrines often filled with runoff water and human waste ended up floating through camp. Diseases would start to become problematic.Considering the size of Sid's army, it was amazing that it was holding together. While it might be small compared to the forces fielded by ancient Rome, Persia, and Egypt, it had to be remembered that it had taken hundreds of years for those armies to reach their largest sizes. Sid had taken a small cadre of untrained men and built it. My mouth and tongue left hers and licked down her neck to her beautiful tits. I kissed her erect nipples softly and then starting sucking on them ever so gently. Everything about her was perfect. There were very few words exchanged over the next several minutes. My pace quickened and my thrusts into her became harder and harder. Her legs wrapped around me and I could feel her nails digging into my back. I felt sudden warmth overcome my cock as she started to cum. Moments later I felt my cock.