Me wanting to explore with my wife

Quick backstory. Wife was all about girls in the past before she met me. All she hooked up with and dated and then I came along. We have a 10month old and it’s been hard to get intimate so to speak. So my mind is now wandering. I never got to experiment so to speak in the past and now I’m CRAVING badly on wanting to do so but with her. I don’t really care to sleep with other girls, more so want to have threesomes with her and see her enjoy other females company. Another thing is her best friend is pretty attractive and before I came along she has always wanted to have a threesome with my wife and her husband but my wife has never pursued it. Now I’m the one that’s been day dreaming a bit and feel very comfortable with them. Would love to maybe get a parents night out or two and share a room together and just sleep in the same room. But what would you all do in this situation? My wife and I hardly ever talk about sex and stuff so it’s a very hard topic to even bring up. Should I just let it be or what?have thought about asking a friend of mine to secretly meet up at the bar one day and run into us and flirt away with her and see where it goes but I feel bad going behind her back like that…. I’m so lost.

TL;DR would LOVE to explore with wife but don’t know how to bring it up? What are your thoughts and options?