Rowena took three seconds to react.
One- Her eyes grew wide.
Two- Her breath caught in her throat and her heart missed a beat.
Three- She turned her son around and pushed her son down the hall to try and get him out of there.
There was only one place where they might be safe- The nursery.
Rowena had placed powerful enchantments and wardings on the room. She had made the room very specific in what it could do, and whom it warded. The door itself was completely invisible. Only tapping the correct brick pattern would reveal it, and even then if a demon looked into the room they would only see an illusion of a sitting room. Though, to high-ranking demons, angels, and archangels the illusion could be easily seen through. Only herself or Fergus could enter the room, and the room itself was warded against almost every monster imaginable. Rowena had made certain that enchantments were placed on the doorway in case anyone did try to enter. They would forget why they were there, or would have a false memory about the room implanted in their mind to make sure that they never knew what it was really for.
Rowena sprinted down the hallway and made sure Fergus got into the room, before she crossed the threshold herself. Twisting herself around, she saw Lucifer and his cronies bolting toward the door, and she slammed it shut. Her breathing was heavy, and her maternal instincts were blaring full blast. She had to do something and she had to do it now before her baby paid the price. She leaned against the door and looked at her son, who nodded.
The two of them had rehearsed this scene many times before. Rowena had had her suspicions about what Lucifer might do to the both of them, so she had routed an escape plan from every room Fergus had been known to frequent, this one included. Rowena opened her hands and raised them to her chest.
"Et iterum modicum, facile ad filium meum!" She cried, extending her arms toward him.
A burst of blue light flashed from her hands and she watched her son be transfigured back into his infant self. They had both agreed that it would be easier for the two of them if she could carry him and make him less of a target that way. Crowley knew that if there was only one place in the world that he was safe in, it was in his mother's arms. Rowena wasted no time and grabbed the diaper bag she had put aside for just such an emergency. She slung the bag over her shoulder before coming over and picking up her little boy. She could feel time slipping through her grasp, and knew she had to act fast.
"Castiel, my son is in danger. We're coming to the bunker." She prayed aloud. Just as she had clutched Fergus to her chest, the door to the nursery imploded with a blast that shook the floor and rattled the bookshelf, dresser, rocking chair, and crib against the walls.
Rowena screamed. It was loud, and rang out clearly throughout the room as she angled herself over the baby in her arms to protect him. Shrapnel sliced through her, dozens of splintered off pieces of wood jabbing her in the back, shoulders, and arms. But she didn't feel anything. She was totally and completely numb to any feeling in her body. All she cared about was getting her child out of there.
She whirled around to see Lucifer standing in the doorway.
"Trying to get your baby boy out of here?" He cooed in a voice too sweet to belong to him. "Where will you take him now to be the baby we both know he truly is? Well, take it from me: You'll never find another place again. Because this kingdom is mine. And I will always be able to find you." He threatened.
Rowena didn't listen to him, and muttered a spell that would teleport the both of them safely out of the room.
She appeared outside the old man hole that led to the Men Of Letters Bunker. Her son had begun to cry after the teleporting, and She bounced him gently, hushing while she climbed down in the hole. By the time she got to the entrance, Fergus had calmed down some, but she continued to bounce him and cuddle him, perhaps more for her comfort than his.
She banged on the steel door, feeling her chest tighten with panic the longer she was left waiting. She was as exposed as she could be, even down here. She knew Lucifer probably already had Demons scouring the earth for her and her son. The idea that he was already hunting her like a hawk would a mouse disturbed her deeply. More than she wanted to admit.
The frantic banging on the steel door sent the Winchester brothers flying up the stairs to see who was there. When they opened the door they were shocked to see who was there.
There stood Rowena, Wood splinters decorating her hair and a few small cuts on her arms. She was panting like a dog on a hot summer's day, and looked disheveled, having obviously left somewhere in a hurry.
Before the two of them could get a word in edgewise, she was inside of the bunker and rushing down the stairs before sitting down at the nearby table and trying to slow her breathing.
"Rowena? What the hell?" Asked Dean. At that very moment, his phone began to ring.
"Hey Cas. You'll never guess who just showed up."
"Rowena."
"How did you-?"
"She prayed to me."
"Okay. We'll see you soon then."
They said their goodbyes and two brothers looked at their guest.
"Rowena, why are you here?" Asked Sam. Rowena looked him in the eye, and he could see the fear in hers. Shaking slightly, she finally spoke:
"Lucifer is back."