Albus wasn't mad at Arianna for telling Mr. M. How could he be mad? She cared about him and, honestly, he was scaring himself a bit too. He wasn't surprised some others quickly found out, but he hated that he wasn't the one to break the news. Things sounded worse when they didn't come from the source. Still, he was afraid of what Nana Lily would say to him. He clearly didn't know her in his time and though he adored her here, he was still getting used to her. Would she yell? Threaten? Punish? Say she was disappointed? The last Al dreaded most.
He wasn't a Gryffindor, but enough bravery ran through his blood to compel him toward his grandparents' cottage. Instead of bursting through all smile and hugs, he paused at the door and knocked. "Nana Lily?" He called timidly.