(Ira's version): We're facing each other in the tub. Jessie's left hand is cupping my balls, while her right hand is stroking my shaft along its length. Her touch is firm and assured, and she finishes each upstroke with a deft twist of her hand. Meanwhile, I'm trying, without much success, to wash between her legs. 'You need to get your tail out of the water so I can soap you properly,' I tell her.
She rolls over, and there's a sudden surge as she thrusts her behind upwards, her back shedding sheets of water like some magnificent sea-creature breaching. Then, she's on all fours in front of me, her ass above the waterline, those lovely posteriors dazzling my eyes like a pair of shining suns.
I soap her buttocks, working the edge of my hand into the deep crevice, closer and closer to her genitals. And when the edge of my hand brushes against her vulva and I hear a sharp intake of breath, I abandon all pretence that this is about washing, and set about massaging her cunt -- parting it along its length. I pay attention to her anus too, making little circles on it with a soapy finger, inserting it into that tight little hole and feeling her sphincter contract as I turn it clockwise and anticlockwise, like when you wash the neck of a bottle.
Cupping water in my hands I rinse down the valley of her ass and watch the suds settling among the dark hairs of her bush which bunch and droop like fern fronds as little runnels of water trickle from them. Then, tugging her buttocks wide apart, I push my face into that deep ravine and plant a long, firm kiss on her sparkling anus. I feel the cheeks of my face enfolded and wetted by the glistening hemispheres of her ass. For a while she pushes back against the pressure of my mouth as if returning my kiss, then pulls away, turns, straddles me, and reaching down for it, impales herself on my prick. She rides me good and hard, and water surges over the sides of the bath with each resounding slap of her butt. Around a dozen good strokes is all it takes, and, as she lifts herself off me, there's a gush of semen, and I watch as my jism slowly sinks, twisting and curling like bath-gel in the water.