Questions about the Common app

These are sort of formalities that go along with the app, and may be pretty stupid questions but I want to do this thing right.
When it asks for names and ages of brothers and sisters are we supposed to include stepsiblings?
And with the question about “if not with both parents with whom do you make your permanent home” are we supposed to put the name of the parent or write “my mother”?

<p>For the siblings you can essentially say whatever you want-it only really matters for them if they are alumni. </p>

<p>Just say "mother," they will make sense of it and figure out how to put it into their system.</p>