Butterfly and I both have women in our lives with replacement attitudes....oh and yes, the ENTITLEMENT attitude since I'm not geographically there to take care of my son either. Both of us would do it in a haeartbeat, but can't....geography...... They both will deny it, but actions speak louder than words.
Actually, I know for a fact that fake-wife avoids introducing my son as her step-son because she thinks that people will think negatively about their family because they are in a step-situation. She thinks it's none of their business so she introduces the kids as all "hers". Reality is that most families ARE in a step-situation and would just blow it off and move on. When they learn the truth -- they get angry at being deceived. Not my problem, I didn't tell a lie.....like fake-wife did.
Fortunately, for my son, he's growing up and forming his own perceptions of what's going on. He's a few years older than Butterfly's daughter, so I'm hoping that hers too will realize what's really going on.
As a SM myself, I share your philosophy and openly discuss it with my step-kids.