First things first.
Just how fat is his wife's left wing arse ?( pics would help).
Secondly .
Stop drinking proseco . It will turn you into a homosexual.
Most importantly, and the only real answer. Go with your gut feeling. If its your shoot , it's your shoot , and you set the rules , and choose who shoots there. Spending time with people that you don't like , will leave you resenting them , and resenting yourself.
We all know that hunts can sometimes be a pain , but as a shooter , I also realise that my shooting can be an equal pain to others . A little tolerance