Kneeling on all fours, I felt the warmth of his spit trickling down my ass crack, a primal lubricant for what was to come. My boyfriend of two years, a hunk with a big cock, slid into me with ease, his hips smacking against my big ass as he began a relentless, hour-long pounding. His thickness filled me completely, our bodies slapping together in a symphony of carnal desire.