please turn my true life fantasy into a story

my wife is about 5,10 blond, nice curvy body and nice firm tits, we were on holiday in Florida at one of the water theme parks, whilst on one of those lazy river type rides you know ,when you float around a river on a inflatable rubber ring, my wife was lying on her back with me next to her , we had been around a few times and I had noticed the one life guard checking her out, my wife must have noticed to because on the next pass she blatantly pushed her breast out and squeezed water from her hair ruffle all over them, the life guard then took of his sun glasses and stared at my wife's tits, not caring that I could see him doing it. this made my cock go rock hard.
later when we got back to the villa we had sex , she had her eyes closed the whole time hopefully she was thinking of the life guard fucking her.
I had many wanks that holiday about the life guard making me get him hard for my wife, putting his huge cock inside her and then clean up duties after they had finished .
could somebody turn this into a story .
many thanks