Staircase sex

I never thought stairs could feel this good. My friend has her face buried between my legs, tongue working me open while her fingers slide in deep. Every step sends another jolt through me. Blonde hair brushes my thigh. Brunette strands tangle with mine. She licks and sucks, presses up, finding that spot that makes my whole body shake. We climb like this, her mouth never leaving me, my hand gripping the banister harder with each flick of her tongue. By the time we reach the top I am already gone, coming hard on her fingers, legs trembling on the last step.