Again, I would like to say I am very greatful to the author of this article. Any relationship, whether intimate or not, works within the expectations and limitations of the parties involved. Unmatched expectations, limitations which are in conflict with the desires of another party, lack of understanding about boundries and expectations can destroy a relationship.
Monogamous relationships come with specific expectations concerning outside relationships.
The rules have to be defined by the parties involved. I was lucky when I met my sr husband to have developed some rules from past experiences. I was even luckier to know a fellow, experienced polyamorist when I met my jr husband who helped us develop more. If you haven't started developing yours, think about it.