He Shared Me With His Friend: Cuckold Game

I need to tell someone my story. My husband James is 26 and I'm Lorna 25, and we don't have children. We had some tests done, and it turns out that James cannot have children, however we both want a baby and have talked about various options. I'm quite attractive and like to dress in short skirts and sexy clothes, but not in a slutty way as I'm only a UK size ten, and still have a nice slim figure.
James has a good position in an advertising company, works in London with a company car and on a good salary but we seemed to be living separate lives, and drifting apart. So here's what happened, It got to the point, where he said he wanted me to go with another man! So he could watch and maybe join in later. I was really shocked and told him that I couldn't do that. So, a few months went by with him going on and on about it, and with all our naughty talking, our sex life had actually become much better, and I was getting more and more turned on by the idea.
Anyway, James had this friend, an old guy called Rob, he was about 60 and always round our house. I'd already drunk a bottle of wine to calm my nerves and was wearing my new red and black knickers and bra set. Sheer black hold up stockings and a shortish mid thigh dress with front opening buttons.