Polyamory

Not that I am there yet, but I hope Viviane put this up in least in part because of me (if she is aware I exist):
'Polyamory is a neologism, signifying having more than one long term intimate, usually but not necessarily sexual loving relationship at the same time, with the full knowledge and consent of all partners involved.
Persons who enter into or consider themselves emotionally suited to such relationships may define themselves as polyamorous, often abbreviated to poly. (Wikipedia)"
More links here.