take the bosses wife hunting or stay clear?

so my boss tells my his wife wants me to take her hunting for deer next season, I was pumped at first but after thinking about it for awhile it could be kinda wierd. How would i tell my wife i'm taking another women hunting for the day(not that anything would happen) any suggestions. should i stay clear and just be nice about it or tell him sure as long as he comes along, or what?