New on the scene.

Hello peeps. New here and pretty much to BDSM too. I am 30 and very happily married. My wife always enjoyed a spanking and since 50 shades ( thank you btw), we have slowly been getting in to it. We have a swing, several toys, cuffs and a home made spreader bar. We have always fantasized about another woman joining us for some fun and started to look into it a little more. Now, we both enjoy taking turns at being sub, but out of the blue she has found a woman that wants to join us and be dominated along with my wife. All I know is what we have done together. I know what my wife likes. But I'm a bit nervous of another woman. What if I'm too much, or even, not enough. Any ideas out there that will help me direct a good, fun and satisfying time for all.