As I started moving, the kisses became more hungry and forceful. Soon after, Sandy wrapped her legs around my back, which opened her up more. The sp...eed and depth of my thrusts increased until I was hitting the back of her vagina repeatedly.Sandy was cumming hard as she begged, "Faster, harder!"I was already on the way to doing just that as I felt my own orgasm on the way. She must have known that I was close as she yelled, "Yes, come for me, Dennis. Come in me!"I rode the wave of our desire. I shivered a bit. I could walk away from all of this, I thought, but for that amazingly endearing and lovely girl on the bed looking at me. It was the thought of losing her that made me most aware of how much I wanted her: to help her, yes, but also to be there for her, to be good for her, to be with her.I sighed. "Death is the mother of beauty," I said. Lauren looked questioningly at me as I got up from the desk and made sure the door was locked, then killed the light and got into bed, the. I'd never had a multiple orgasm until last night."I'm left bemused and ask her "Why are you telling me this?"She replied seductively "I need a better sex life."Then she turned around walked over to the bottom of the bed, she knelt on the edge, then slowly leaned forward, the further forward she went the more of her curvaceous bum became visible as her silk nightie slowly rode up her body.She dropped down to her elbows, then lay her face softly against the mattress. Once comfortable she beckons. "You will get us caught." No one will catch us," I said, slipping my hand down her panties and squeezing her moist pussy. "Don't be silly, big sis. You know you want it, you are wet already."I bent her over the counter, flipping her dress over her back, and knelt behind her. I pushed her panty crotch aside and swiped a quick lick up her pussy and swirled my tongue around her puckered asshole. She shivered, moaning very softly. I pushed one finger then two into her pussy and pumped them a few.