We've seen lots of poly/mono relationships work through the issues.
Mr. Babe, I'd suggest you get a login.... that makes it A LOT easier for us to know who we're talking to. It gets confusing enough around here.
One advantage here, is you quickly learn the vocabulary of poly, so it is easier to talk about what is going on in your lives. Redpepper wrote an excellent article on jealously.. http://www.polyamory.com/forum/showthread.php?t=1877
You're in the right place. Keep talking. At first I was surprised at the information disclosed in these forums... but I've watched many couples work through the disagreements-- to a variety of conclusions.