My parents loved each other. I was raised in a house of total love and respect. My dad worked very hard and my mother was incredibly devoted to him. I can unequivocally without any peradventure of doubt tell you that I was raised with the kind of love that we only dream of.
We're learning how important it is both to preserve sibling relationships if they work and repair them if they're broken. We're also learning a lot about nonliteral siblings - stepsiblings half-siblings - and the surprising power they can have.