Wife incentives my best friend to lose weight with sexual rewards [MF]

A few years back my wife and I had discussed having an MFM. After a long discussion and interest from my friend we had decided that engaging in a threesome with someone we knew was the best option. I had shared various pictures of my wife, Sarah with my friend Matt and he had expressed quite a bit of interest in her. On one occasion we had visited a club and they definitely tested the waters. My wife rubbed her ass against his very hard cock and his hands had no problem touching and grabbing her DD breasts and ass. I had enjoyed watching them dancing and seeing him explore his body with her hands and his cock rubbing against her ass was extremely enjoyable. The three of us are pretty close and I had no problem sharing with a best friend!