Well i had the same sort of thought until i actually took the time to think about it and seriously put myself in the position.

i mean, this person would be basically your best friend. you would care for her just as much you would your Dom, so i would think, in a good "triangular" (thats right i'm making up phrases now! :P) relationship, there would be no jealousy or envy.

of course it's hard to really speculate on these kinds of things, because i truly believe that it's one of those things you have to actually experience, but damnit i can fantasize!

although, in general i'm not that jealous of a person. as i mentioned before, i am in a polyamorous relationship. so ultimately it's just another one of those things that simply is not for everyone.