Rose loves her mum. Her dad too, now she’s had the chance to get to know him. He’s a good man, and he’s overjoyed at having a daughter.
She’s got a baby brother now, and dotes on him the way any big sister should. This is what it means to be part of a family. It’s good.
But it’s not enough.
When she looks in the mirror she can tell she’s not fooling herself. She wants more than this, wants what she had, to travel the universe with her Doctor. She’ll do whatever it takes to get back to him.