As a suggestion, in order to make this less confrontational, I would suggest that you use the language of your "needs" and "wants" rather than your "conditions". Each person needs to feel free to put their own needs and wants on the table and then the three of you can work together to see what (if anything) is possible that meets all the needs.
Please check out The Birdcage - an open, friendly Polyamory forum for all parts of New York State
"Listen, or your tongue will make you deaf." - Native American Proverb