This guy had exeife kick out the minor sd's the moment he could whilst bio dad has been the only one financially responsible for them and made an effort to make sure they got the best education. 
but hcgubm brainwash skids often to accept stepdad like a real dad. 

but bio dad's wife is to be acknowledged as the trashy hoe. Its such hypocrisy and double standards

I blame Disney first off. It's drilled into kids that SMs are evil. Other films, even Stepmom, don't really put us in a good light. It's always some jealousy of BM or we're the money grubbing new wives (as if!!).

But the media in general parade us as homebreakers, jealous, evil women who want nothing to do with these children. Even if that last part becomes true, it's usually not from the get go. What I see when I read all of these blogs are a lot of SMs who have tried very hard to blend families, BE a family with children who are not theirs, and it is usually undermined by the BM or other family members, sometimes even the DH.

So why SMs and not SDs? How many movies can you name with an SD who has not already replaced the dad or with an evil SD? SDs are usually set up by the (primary carer) BM to replace dad. Dad is bad, he's a deadbeat, a loser, an abuser. BM is goddess and whatever man she gets with is dad replacement. When SDs aren't called "dad" people ask why, but never the other way around. The media and society in general revere the golden uterus, that is the good story.