Cocktail Party at Bill & Michelle’s

I had known about Sue’s office escapades for several months now and still kept it a secret. I had seen Bill and Michelle several times and no one acted strange in any way, although I secretly had a massive desire to have sex with Michelle.
We were invited to a cocktail party at Bill and Michelle’s house, with some of their friends and neighbors. Sue was the only person from the office invited and the party was a semi-formal get together that they hold every fall.
I wore a dark suit and Sue dressed in a very nice black cocktail dress. Her dress was very sexy, but classy at the same time. We arrived at Bill and Michelle’s and found most people were dressed in very similar attire. Michelle was wearing a gold cocktail dress that made her look incredible.
We mingled with everyone for a few hours and had a couple of drinks. No one drank much, as this was a more of a formal get together than a drinking party. Around 11:00pm most people started to leave, and everyone but Sue and I were gone by 12:00am. Sue offered to help Michelle tidy up a little, so Bill and I went to his bar for a drink.
Bill and I chatted for a while about sports and stuff, and he gave me a tour of their home. They had a very nice home, but not over the top. He had a detached garage with a man cave above in the loft with a bar, big screen tv, dart board and poker table. He also had a change room at the side of the garage with a separate door out to his back yard.
Bill and I went outside and he showed me his impressive deck, pool and hot tub area. The pool was closed for the season, but I could hear the hot tub running. The hot tub was perfectly placed to provide privacy and you could only see one corner when you came out of the garage. We went back inside grabbed a couple more drinks and Bill turned on the tv. Sue and Michelle joined us shortly after.
We all had a few drinks and started to lose track of time, when I suggested that it was late and maybe we should head home. Michelle told us that although she enjoys the little cocktail parties, she would like to have a couple more drinks and relax. We agreed to stay a while.
Bill refilled everyone’s drinks and suggested we jump in the hot tub. Michelle said, “Great idea.” I looked at Sue and she smiled, meaning sure. Bill told us we could grab a couple of robes in the change room. Sue and I went in to change and put on the robes. I left my boxers on and thought Sue left her bra and panties on. We came out of the change room to find that Bill and Michelle had already gone outside. We grabbed our drinks and headed out to join them.
We rounded the corner and came out to the hot tub Bill and Michelle were already in the tub. I could see that Michelle was at least topless, but her impressive tits were not in full view. I hoped I could get in the tub without my hardening cock giving away what I was thinking.