Her words galvanized me into motion. I sat up and reached down to grab her hips. She was surprisingly light and I lifted her up off of my d**k. I heard it slap wetly against my abdomen, but was too distracted to look down at it. My sister's hard n****e had pushed right into my open mouth. We groaned in chorus as my lips closed on that irresistible, throbbing tit-flesh and I started sucking on it hungrily. Stacy wrapped both hands around my neck and shuddered in my grasp. "Oh, damn," she panted, practically into my ear. "That feels so f*****g good. Oh! Oh, s**t!" I felt wonderful, warm wetness engulfing the head of my c**k. I was completely focused on sucking my sister's breast and it took a full minute for me to realize that my hands had pulled her down onto me. By then, half my d**k w

