Izzy had to admit that taking care of a newborn was an excellent distraction from her grief over losing Roz. They had been together for so long that it felt like a part of her was missing now that she wasn't there anymore but her baby sort of helped fill the void.
No one could replace her—she was an existence beholden to no one, sort of like Julian—but having someone new to love and spend most of her time on helped. Love was infinitely replicable. Just because she loved her daughter didn't mean she loved the person she had been named after any less.
She had to admit there were some eerie similarities though. Most specifically, the fact that her daughter was a genius like her friend had been.
Rozzy spoke her first words at six months and her first full sentence at ten months. She nearly gave her mother a heart attack by piping up, "Mommy, come read to me."