Val got a lot more irritable when Rosie and Axel came around. Not towards them but towards literally everyone else. She got over protective very quickly. No you can't hold Rosie, no you can't buy anything for Axel, go AWAY.
She had to make sure Axel knew he found a new home that's safe and that he and his sister will be loved and cared for. So what if everyone else thinks she turned into a massive bitch? She'll bite their fingers off instead.
Well her attitude changed mostly towards acquaintances.