Valkyrie walked to the back door, which hadn't been closed properly, shut it and locked it. There was now a baby in the house, after all. She couldn't take the chance that a wild animal might wander in and make off with Alice, like those dingoes in Australia. She was probably being unfair to both dingoes and Australia, but she couldn't risk it. Locked doors kept the dingoes out, and that's all there was to it, even if she didn't know what a dingo actually was. She took out her phone, searched the Internet, found a picture of a baby dingo and now she really wanted a baby dingo for a pet.
Most people who offer their help do it to make themselves feel better, not us. To be honest, I don't blame them. It's superstition: If you give assistance to the family in need... if you throw salt over your shoulder... if you don't step on the cracks, then maybe you'll be immune. Maybe you'll be able to convince yourself that this could never happen to you.