“Oi! Evans!” James yelled, walking briskly after her.
She didn’t reply.
“EVANS!” He yelled louder, climbing through the portrait hole after her.
She didn’t reply, and instead retreated to the girl’s dorms.
“Can’t follow her into there, mate,” Sirius said.
James looked around. There he was, sitting on an armchair.
“Did you know she didn’t go home?” he asked.
Sirius shook his head, “She usually does.”

James flopped down next to him. “Remus? Do you know why?”
Remus looked at him and paused.
“Oh come on, tell me!”
“She had a fight with her sister.”
“Her sister?”
“She’s a muggle.”