She knew that Frank and Alice would be a bit distrustful, if they were alive, but with the new revelations, they would have more trust towards Narcissa. Narcissa also informed her about the other Potter boy that had led to the downfall of the Potters with the replacement bond and that he was now known as Akira Kurusu. She told her the entire story and Augusta had to admit that what the Potters and his two godfathers had done with the boy was disgusting. This was another reason why she was sheltering her grandson so much, because Augusta didn't want Neville to be influenced by anyone, who had bad intentions. It is already bad enough with the other members of the Longbottom family, who are ambitious to get the Longbottom heirship, but she was sure that they would fail since Neville isn't a squib. Augusta had to wait until Neville is eleven, but she already told them that in the heir script Neville was still the heir of the Longbottom family, which was annoying to the other family members, because a squib shouldn't be able to inherit.