I laughed and said, “Do you need any help?”“No, I think we can handle it. Bill can put the air bed away later,” Carol said.Kim and Carol head...ed to the family room. Bill and I decided to make pancakes and got up to get started. I began frying sausage patties while he mixed the batter.“I think my sister likes you, Matt,” Bill said.“I like your sister, Bill. She seems like a girl I could get along with.” I laughed. “It seems the four of us are of the same mind regarding sex.”“After last. I cannot believe what I did next.I turned towards her, grabbed her thighs, and shoved my face between her legs. I put my nose to the wet spot on her jeans and inhaled deeply. Her womanly scent triggered an explosion of fireworks in my brain and my semi-hard cock turned into a steel rod in an instant.She grabbed my head with both hands and mashed herself into my face, grinding her pussy into my nose. She moaned as I worked my mouth over her denim-covered patch, my teeth gnashing at the material,. “Just what I wanted on my birthday, to be explaining to my older sister how my mother tries to kill me in 15 years or so.” I said sarcastically.“Just tell me, you ass.” Chloe said.I looked over at her. My eighteen year old sister. I thought back to myself. Maybe I was being too harsh towards them. I mean, I remember what Chloe was like when she was eighteen. Even though she could be a bitch, she could be cool. I debated with myself for a few minutes, honestly debated with myself, if I should. " Mac released my cock and stood up, and moved in front of me, facing the screen. I reached under her skirt, hooked my thumb and forefingers in the waistband of the thong. The thong was down at her knees with one quick tug, and I quickly held my cock upright. She sat back, and my cock slipped into her pussy with ease. Our faint moans were drowned out by the movie as she bounced on my cock. I reached around, unbuttoned her top, and gently squeezed her breasts with one hand. I kissed her slender.