Well, yeah, there were a lot of problems with not calling first. Alice could arrive to find that Bella, Edward and Nessie were all out. Or that they were enjoying some private time while the baby slept. Or whatever. Lots of things were possible.
"Oh, don't worry about me. I'm not hungry. Are you hungry?" She asked, tickling the baby's tummy. "Are you my big, strong, hungry girl?! Yes, you are! Yes, you are!" She couldn't get enough of making Nessie laugh.
"Oh, don't be silly! I have to spoil her rotten. It's pretty much in my job description as an Auntie."