I want to fufill my fantasy....

That I am married to an amazing woman, but she doesnt like s**....like hardly ever....Me being a highly sexual female....wants s**! She has admitted to past threesomes and its eating at me because i have never had one....i want to try with a man and my wife (she is strictly into me) and one with my wife and another female....im sick of masterbating....i watch lots of three way p*** and honestly i wanna be that girl in the middle....or id love to have someone watch us go at it and touch themselves....is this bad?