I started kissing down on to her tummy before coming to the waist of her knickers. Her legs parted as I planted little kisses over the lacy material ...overing her bulging pussy.Her knickers were as sheer as her bra, leaving little to the imagination and her slit was visible with chubby pussy lips each side. She thrusted upwards, pushing her pussy in to my face as I started to tongue the thin material covering her lips.I pulled her knickers to one side, exposing her pussy fully to her stepson. I get to my feet still in some mild pain from the unexplained pain and follow her. She leads me to a large room with other girls dressed similar to me they too have on the string bikini. The woman I notice for the first time is also wearing a string bikini but she also has a sarong wrap around her hips. I am told to bathe some of the other girls are entering the bath while others seem to be assisting. As I remove the string bikini I notice that only three of us have the metal rings attached to. 'Me too' I replied.We resumed our kissing with this gorgeous girl impaled on my cock, neither of us moving any part of our body below our shoulders. Charlotte's breathing became more laboured and then, with no other warning, she orgasmed. Her body shook and I felt a distinct wetness flood over my groin and she cried out and then was still. Slowly her breathing returned to normal and she resumed our kissing. 'Thank you!' she said 'I gush a bit sometimes'. 'I noticed' I replied. 'You don't think. Instead of leaving his shorts on, he took them off and so was naked. I asked if she felt awkward or threatened by this. She laughed. "Good heavens, no! For a start, he's not in the slightest interested in women; also, when I'm working down at the hospital I see plenty of folks naked and they are usually more embarrassed about the whole thing than I am." We moved onto another subject and it was forgotten -- until last night, that is.As usual, I slipped my shoes and socks off, then took off my.