This is the final part as Ann is no longer just a tease and the fantasies we have had for many years is now a reality. As described previously, Ann is a sexy 5ft bombshell - 49 but looks a lot younger, with big boobs and a pretty face. She loves showing off her body - particularly to older men. Last week she came back from yoga and described how Bill, the yoga teacher, a stocky man in his late 60s, had given her a sensual massage at the end of the session, allowing him a good feel of her bum and a look at her pussy. More was promised this week, and Ann obviously had things planned as she said it would be a good idea if I could watch what happens. She told me to turn up at the end of the yoga session and hide in the small side room so I could look into the main hall. Well, it was even better than imagined. I went into the side room unnoticed as everyone was leaving. The door was slightly open, and as it was dark in the room I had a good view into the hall but could not be seen. Ann was helping Bill collect up all the mats and then she put a mat down fairly close to where I was hiding. She lay down on her front and Bill came over with some oil in a bottle and knelt down behind her to one side, slightly backing me which was good as he wouldn't notice me looking. He asked Ann where it was stiff and she said it was her lower back and her glutes. Bill lifted up her t-shirt and then rolled down her leggings about halfway down her bum. He started rubbing her back, and looked like he knew what he was doing. He said she felt a bit tight and worked down so his fingers were going onto her bum and outwards. I loved seeing her oiled cheeks being spread so her bud was visible - Bill was looking intently at this as well. I was stiffening up so just released my cock and rubbed it gently while watching. Bill then surprised me by asking if he could take off Ann's leggings to work on her thighs. She said fine and lifted her hips so that he could slip them off. It was the sexiest thing I have ever seen. As he put them to one side, Ann relaxed down onto the mat and opened her legs slightly. It was the first view of her pussy that we had and Bill was now working down from her bum, onto her thighs and under towards her pussy. It was fantastic - I was so hard now and Ann was obviously enjoying this as she was starting to moan slightly. Bill rubbed his thumbs over the crack of her arse, pressing slightly on her bud and then went down and outwards. He was an expert and soon had Ann gasping as his fingers gently touched her outer lips, slightly spreading her pussy. I could see everything - he worked down her lips until one stubby finger just entered and worked up and into her pussy. Ann was loving it, arching her back, raising her arse and wanting more. He put two fingers deep into her wet pussy while the thumb of his other hand rubbed her bum hole. He gently moved his middle finger along her pussy and he must have found her clit as Ann was breathing heavily, her neck going red and she was closing her eyes. It didn't take long - she orgasmed loudly, collapsing down onto the mat. I was still rubbing my hard cock and wondering what would happen next. As Ann lay there recovering, Bill knelt up and pulled his stiff cock out from his jogging bottoms. It was shorter than mine but much thicker, veined and strong looking. He was just looking at her spread pussy while stroking himself - I must admit I was getting even more turned on watching him. Ann then looked up and behind her and saw his cock. She turned over and reached up for Bill to move towards her so she could feel him. She rubbed his knob slowly, pulling the foreskin back and then putting both hands around the base. She sat up to take his knob end in her mouth, rolling her tongue around the end and then went a little deeper. She is good with her tongue and teeth and Bill was starting to thrust into her. Ann wanted more though and pushed him away, lay back down and asked him to fuck her. I was in heaven. Bill, with his belly and thick cock, moved down on Ann, spread her legs and guided himself in with Ann's help. He pounded heavily and Ann lifted her legs around him. He didn't last long, coming loudly and deeply into her pussy. This was too much for me and I came out of the room. Bill looked horrified and moved over quickly, but I told him not to worry - I loved what I had seen. Ann was smiling and looking at my stiff cock. I told her to take her top and bra off and I got one of the yoga cushions for her to lie face down on with her bum in the air. I then lay over her so I could play with her large breasts and nipples. I pushed my cock into her gaping and wet pussy, still dripping with Bill's come - my first experience of sloppy seconds. I pounded furiously, and came too quickly, watching Bill looking at my cock sliding in and out of Ann's beautiful pussy. We cleaned up and talked about the experience. Bill told us he has a number of pensioner friends who would like to practice some photography with a female model, so this could be the next step for us. Looking forward to it already.