My wife, what would you do to her?

 It doesn't sound like she's ready for a whole group, yet... Unless things have "progressed" since your first posted...

 I would love to talk, then get closer.... A slow, gentle seduction... A hot, steamy, passionate "one on one" at first... Then, once she is more comfortable with your fantasy, we can move to a threesome.... And eventually a GB... Some women simply need a bit more coaxing...