It wasnt anything that we hadnt seen many times before. Mom and Dad were very sexual and were swingers and they had never hidden it from us. We also b...longed to a family swingers nudist club where we often spent time. The club did not allow sex with or in front of underage children, at least not officially. Dad and I whistled and encouraged them as we stripped out of our clothes. We all spent a lot of time nude around the house and Mom and Dad never closed their bedroom door even when they were. She shoved herself down more into the stool opening and I took my cue, sticking my tongue into her snatch, licking all around and probing inwards as far as possible. I have never been helpless like this when eating a woman out. I normally have use of my hands. It meant I had to thoroughly concentrate on my oral skills and from the noises she was making, it seemed that I was doing a good job. After a couple of minutes, I saw her hand come towards my face and realised she was using a finger to. Dad was in his armchair, and the brat was curled up on his lap. Like she usually did, she had got ready for bed, and then come to spend the last hour watching the TV with our parents. It was common to find her like this.She was wearing a red silk nightshirt that stretched down halfway from her crotch to her knees and was barefoot. Dad was soothingly stroking her long blonde hair while she was sucking her thumb in that c***dish way she had, while watching the documentary. As her lips pulsed on. My head instinctively turns arounds.I see her. The woman walks seductively and purposefully toward me. She has long white dress on with strings wrapped around her neck to hold it over her large, wobbly breasts. It is tight enough to hug her slightly plump but toned belly and then it flairs out over her massive hips. She looks incredibly sexy. I focus on her face. Her hair has been pulled back. She has large hazel eyes, heavy pink mascara, rouge on her pale cheeks, bright red lipstick on her.