PS: I'm not following 'The Cursed Child' I just got an idea about Delphini.
PS2: The Marauder's Map works in the Malfoy Manor.
"Lily, it's okay," Severus said, when they arrived to the Malfoy Manor. She was sobbing. "We're gonna rescue them, doesn't matter what."
"You promise?" Lily asked him, scared.
"I promise," Severus said, kissing her forehead. She hugged him. "I'm sorry…. I'm sorry for everything."
"I'm sorry too, Sev," She confessed and they shared a small smile. "Let's do it." Lily said and they made their way to the Manor.
It was dark and cold. They got inside the manor and started to look for the children. In each door were two Death Eaters, it was easy for Severus to attack them. They weren't paying attention to their job. They were talking about muggles and stuff like that. When they got near the living room, they heard a woman's laugh. Bellatrix's laugh.
"That crazy bitch," Lily whispered, and Severus smiled. "I'll kill her." They hid behind a wall and listened.
"What are you gonna do with them, mother?" A girl's voice asked. It was Delphini's. Severus and Lily stared at each other.
"I think that I'll torture the girl," Bellatrix said, laughing. "And the boy deserves to die." Lily covered her mouth and stared at Severus shocked.
"Can I take Eleanor back to Hogwarts? She is innocent." Delphini said, worried.
"No," Bellatrix said, playing with her wand. "Now, go away and let mommy play for a while." Delphini nodded and left.
"What have I done?" Delphini thought and closed the living room's door. She noticed that someone was staring at her. She turned to see who it was. "Professor Snape?!" Delphini said, getting closer to them.
"Shh," Severus whispered, putting one of his fingers on his lips. "Where are Eleanor and Harry?"
"Who is she?" Delphini asked, staring at the redhead woman. "Are you Eleanor's mother?"
"I'm Harry and Eleanor's mother," Lily said, serious. "Why did you bring them here?!"
"We can't talk here… Follow me," Delphini said, walking away. Severus was going to follow her, but Lily stopped him.
"Can we trust her? She took them here," Lily said, grabbing his wrist.
"I don't know, but it's our best chance," he said, and Lily nodded. They followed her to a dark and small room.
"I shouldn't be doing this, but I need to," Delphini said, while her wand illuminated the room. "Because of Harry my father died, and my mom and I wanted revenge… I was going to help her to kidnap Harry, that way she could kill him before my father gets back. But I don't want this. I don't wanna hurt anybody… I'm sorry." Delphini said, staring at Lily. Lily didn't know what to do. She was mad at her, but she understood the girl.
"Do you wanna fix this?" Severus asked her, serious. Delphini nodded. "Then help us to rescue them." Delphini stared at him for some seconds before answer.
"My mother can't know that I'm helping you," she said, and Severus nodded. "No one can."
"Where are they?" Lily asked her, worried. Delphini took a paper from her pocked and opened it. It was the Marauder's Map. "Where did you get that?"
"Professor Malfoy took it from Fred and George in DADA and I took it from her office." Delphini said, smiling. ""I solemnly swear that I am up to no good," Delphini said, taping the map with her wand. It showed everything about the Malfoy Manor. "We're here, and the guys are there," Delphini showed the map to Severus and Lily. They were far from the guys. "What the hell!?" Delphini exclaimed.
"What is it?" Lily asked, staring at the map. "Dammit! Hermione, Ron, and Sirius are here! Not to mention that Narcissa is here too," Lily said, staring at Severus in shock.
"Delphini go to where your mother thinks you are and leave the map with us." Snape said, and Delphini nodded.
"Stay safe," she said, and closed the door. Severus turned to Lily with the map. "Lily, I'm not just Eleanor's father, I'm a teacher too and I need to keep my students safe." Lily nodded. Of course that she knew that. "I'm pretty sure that Hermione and Ron followed Narcissa, so she must not know that they're here."
"And I'm pretty sure that Dumbledore told Sirius what had happened and he came here," Severus nodded. "We can't go in different ways, we only have one map." Severus stared at the map. Narcissa was moving to where they were. Severus opened the door and grabbed her arm, bringing her inside the room.
"Cissy, it's me," Severus said, and Lily rolled her eyes. "I told you to stay in Hogwarts!"
"It's not time for that, Severus. I'm trying to help you," Narcissa said, staring at him.
"Thank you, Cissy," Severus said, giving her a smile. "But now we have to rescue four children."
"Four?" Narcissa asked, confused.
"The Potters, Granger and Weasley,"