If you're here to find a "third," a "woman to share" who has to like your kids, but not let them know she's your sex partner, who won't be introduced to your friends and family (be "discreet"), who must be equally in lust with both of you, you are unicorn hunters.
Please read this article about the hazards of unicorn hunting:
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve. -- Shelley
Mags (poly, F, 61) loving miss pixi (poly, F, 39) since January 2009, living together since 2013
"Master," (mono, 36), miss pixi's Dom for 3 years