watching my wife being a total slut to my total shock and surprise

I have tried to write this story a couple of times and it does not save so I am going to write it in two halves part 1 and part two , a good few years ago my wife Debbie was and is still a legal secretary for a big solicitors office I had just started up my own photography business , one particular morning Debbie mentioned at breakfast she was attending court today in a town about 50 miles away it was only after she had left I realised the prospective customers I had a meeting with were only a few miles from the court she was attending so I thought I might surprise her and take her for lunch if I was successful with the catalogue company , Debbie is a red head about 5ft 4" tall about a size 14 to 16 and has this habit of wearing clothes a bit too tight for her but she crams everything into them almost which extenuates her sexiness , she has quite big boobs with good sized nipples unusual on big tits I always thought, she always shows plenty of cleavage and that morning was no different she was wearing a matching short black skirt and jacket and purple top and what I thought was black tights and high heels.
I won my contract at the clients and so went on to the court they recessed usually at 1pm but I was very early arriving at 12.15 the only parking space I could find in the huge car park was right at the back of the court under some overhanging trees where there were only about 10 other cars parked, I reclined the seat and lay back thinking about my success at getting the contract with the catalogue company after a short while only a few minutes I heard voices and a door slam I immediately recognised Debbies voice as I looked up she was walking toward the parked cars with two guys , I was just going to sit up and open the door when one of the guys put his hand around her waist and groped her bum and I was even more shocked when she threw her hand back and grabbed his groin through his pants I slouched back down feeling angry and very jealous I couldn't believe what I had just seen and contemplated what I should do *******