Thank you Tonberry, MrFar and Black Unicorn for your responses.
Tonberry, I'm curious and alarmed by what you said about people worrying their children could get taken away. Has this happened? This isn't illegal, is it? Could a well-cared for child really be taken away from its two loving parents just because there was a third person involved?
BU, those are all great things to think about and discuss. Thanks!