Yes, it's no one else's business who sleeps with whom, but being in the closet gets old real quick. I imagine that it's cool if your wife holds your hand in public, gives you a long hug goodbye, says hello with a peck on the cheek -- a potential gf would probably want to have that same freedom, in time. You certainly can cross that bridge when you get to it, but it's something to keep in mind...
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.