I don't think I've ever questioned my lifestyle, though in the past I did have concerns about what our kids would think or what their friends would say or how would they act if they knew.
But, years down the road now we've been open with our kids about our other relationships (we moved more toward polyamory several years ago) and are completely out to our friends and family, so this is really no longer an issue for us.
I don't think I've ever thought what I was doing was wrong and wouldn't be setting a good example for our kids. What example did I want to set anyway? That there was only one way to live - assumed monogamy - and I was going against that but they shouldn't? No. I told them that this is how I believe, this is what I think of relationship dynamics and this is how I've chosen to live my life. I also told them they can make their own choices. Both my older daughters (19 and 16) have stated they don't think they want relationships like I have, but both are open to the relationships I have and welcome my partners with open arms.
Mr. WS