Visiting Gotham (Maria)
Sin had gone to Gotham with her mother for a florist's convention for a couple of days (why that convention was in Gotham, who knew, but she was there anyway). And since Sin was in Gotham, she couldn't pass up an opportunity to visit one of her oldest friends. She had called Maria earlier that day and made lunch plans. Sin took a taxi to Wayne Manor. She got out, and walked to the door. She rang the doorbell and waited for Maria.