I'll make this one happier... I promise.
Aimee
The three of them – Severus, Lily, and Harry – were intercepted by Dumbledore before they could make it back to the Snape mansion. He took one look at Lily and insisted they went directly to Hogwarts, in fear of running into Severus' father.
Lily and Severus both held on to Harry as they Apparated to the Hogwarts gates, where Hagrid, the gamekeeper, was waiting to meet them. He instructed them to go up to their old room, where Dumbledore had set up a crib for Harry. They gradually made their way there, being stopped by the occasional staff member who was much too concerned for them.
The moment they closed the portrait hole leading into Lily's old room, she gave Harry to Severus and collapsed onto the large four poster bed, now black. Severus looked down at the baby, and seeing his was now fast asleep, set him in the crib provided by Dumbledore. He laid down next to Lily, taking her in his arms and pulling her as close as possible.
"How come it feels like it's been forever?" he sighed, closing his eyes.
"I don't know…" Lily said quietly. "Severus, I have something to tell you."
"Yes?" he asked, looking down at her.
"I… Dumbledore told me who Harry's father was before James and I went into hiding." Lily admitted. "Do you want to know?"
Severus thought for a moment, then nodded. "I promised you that even if he wasn't my child, I'd still love him as if he was. I intend to keep my promise."
Lily nodded, then breathed in deeply and her grip on Severus tightened. "He's James' son. I'm sorry. Sev."
Severus shook his head, "It's not your fault. He's still our son, regardless of blood lines."
"Are you sure?" Lily asked quietly.
"Baby… Shh… I love you, nothing's ever going to change that. You love Harry, he's your son. Therefore, it's impossible for me to even remotely hate him. James… I'm sorry Lil, but you know I hated him. Even though Harry's his child, he still has you as his mother."
Lily reached over and kissed Severus on the cheek. "You're going to be a great father."
"One day." Severus said, "Aren't we going to have a million babies running around? Harry's going to have a thousand siblings to put up with, you know."
Lily smiled and Severus noticed her skin was slowly regaining colour. "I want at least one set of twins."
"Twins, love? Are you sure we could handle twin infants?" Severus asked, pulling the blanket over them.
"I'm sure." Lily said defiantly. "And we have to have a little girl, too…"
"Two or three little girls." Severus corrected. "One's just never enough."
"And a son… you have to have a male heir." Lily said softly. Severus shook his head.
"I want a son, Lil, but not for an heir… For a playmate to Harry." He smiled, running his fingers through her hair.
Lily smiled and sighed, closing her eyes. "You're amazing."
"So I've heard." Severus laughed lightly. "Now go to sleep, baby. You're tired."
"Ok…" Lily sighed once more, cuddling up to her husband. "I love you."
"I love you too, baby. Now sleep."
The news of Voldemort's defeat spread quickly throughout the wizarding world. Lily, Severus, and especially were Harry were instant celebrities among the population, much to their dismay. All they wanted to do was start their life together, but instead they had reporter after reporter knocking on the Hogwarts gates day and night. Word got to Severus that in his Master's defeat, his father had fled the country. Severus and Lily were free to move in to the Snape mansion with Harry. Their marriage was publicly known now; Dumbledore made sure to continually confirm it was legal. A plan to have a true wedding was quickly dismissed, as both Lily and Severus were content with their small wedding three years ago.
Severus got along with Harry as well as Lily had expected; he was constantly playing with him, delighted to have someone to take care of, regardless of parentage. He took responsibility for Harry at times when even Lily was too tired to deal with the toddler. He was the perfect father; he needed to prove to Lily he could do it, that he could take care of a baby no matter what the circumstances.
Lily was still emotionally scarred from that night. Leaving Harry alone with Voldemort seemed to up her anxiousness, especially when it came to leaving Harry alone at night. Many nights, Lily was too afraid to leave her son, so Severus transferred his crib to the master bedroom, moving it as close to Lily's side of the bed as possible.
She always had nightmares; Severus considered making her a potion, but he knew she'd refuse to take it. She insisted the nightmares were for the best; they made her relive her experiences so she could accept what happened. She visited Dumbledore constantly, asking for advice and just to speak. She had a new way about her; she was paranoid one of the Death Eaters would try to revenge his Master's death and try to kill a member of her family. Severus made sure it was impossible for anyone to get onto the mansion's grounds; he heavily hexed different areas around the gate, making sure only a member of the household could get through the gates unless otherwise invited in. Only he and Lily had the ability to Apparate to and from the house.
They had few servants; three house elves and a butler,
all of whom were originally employees of Severus' father and refused to
leave. Lily insisted they do minimal amounts of work and even offered to
pay them; however, the butler insisted room and board was enough while
the house elves flat out refused, looking scandalized at the mere mention
of wages.