I think poly relationships are difficult because of the way we have been brought up to believe in the one true love...

But do any of us even begin to question our ability to love all of our children? Do we ask if we can find time to share equally among them all? Are there sibling rivalries?

Change a few words and you're asking the very same kinds of questions about poly life, and the same holds true with regards to having multiple interlocking D/s relations.

I don't see why it shouldn't work if everyone involves is communicating.