So, I shouldn't be starting new things, but I think I can get away with this. I'll update as I come up with ideas. No 'Danny saves (insert character here) and accidentally reveals his secret' here. That's for another story that I might get around to writing if I ever finish everything else I started.
I should note that these might throw canon to the wind (aside from the typical firing of Phantom Planet into deep space where it will never be seen again), because sometimes my brain likes something that doesn't make sense.
There were several beats as they simply stared at each other, vacuum whirring in the background. It was likely very difficult for her to process, seeing Danny Phantom meticulously clearing vibrant green webs from the walls via levitating while Jazz dusted the furniture on the ground.
"Mom…" Jazz began quietly. "I can explain."
Her eyes didn't leave him, ghost him, even as she nodded. She was angry. Silence was not something she was prone to even under the worst circumstances, and he'd very rarely seen her speechless with anger. As it was, he felt like he was locked in something like an old western showdown, his mother just waiting for him to make the movement that would signal her draw.
He swallowed thickly. He did not want Jazz to be at the mercy of their mother when she was that angry. Letting a ghost into their house was a treachery beyond any other, especially given their disposition toward the entities. He needed to calm the storm going on in her mind.
"Jazz, wait," he said, switching off the vacuum. "I'll explain."
A twitch from their mother, but still silence.
"But…"
Your secret was the unspoken end of that protest, and he shook his head in response. He turned his attention to the blue-jumpsuited woman in the doorway and took a deep breath.
"…Can you trust me for a moment?" Dumb question, he knew, but one he needed to say. "I'll keep my hands on the vacuum, and I'm going to return to the ground."
Her eyes narrowed in scrutiny, probably trying to dissect his motives, or understand why he wanted to return to the ground. He waited, not daring to move before she agreed.
"…You, a ghost, are cleaning my house," she finally said. "I don't trust you, but I want an explanation."
"And you'll get it, I promise."
"Fine."
He nodded, and planted his feet on the ground.
"Okay, Ecto-arachnids make a huge mess," he explained. "I stirred up a nest by accident. This…was a whole lot worse ten minutes ago."
"Ecto-arachnids."
"Right."
He glanced at his sister, deflated a little, and turned back to his mom.
"Jazz didn't invite me in. I've been here. I…well…it's me, Mom." To those words he received something of a confused and mildly disgusted look. He tried not to take it personally, but he winced nonetheless before continuing. "A white ring is going to appear around me. It's not an attack. It's just what appears when I switch forms."
This time he didn't wait for permission. He just reached into himself to the warmth of his human half and let the transformation take place. When white hair and green eyes were replaced by black and blue, he gave a wry smile. His mother looked…well, as pale as if she'd seen a ghost.
Then her head tilted in a half head shake, a smile trying to be a frown consuming her features as she closed her eyes. It was the same look she got when she finally figured out that annoying little something keeping her from calibrating a weapon just right. Something that she knew she should have seen long before.
"Danny Phantom," she breathed. "Danny Fenton. It's so obvious it's completely inconspicuous. It's genius."
"No, Danny's just ridiculously uncreative," Jazz supplied.
"Oh, like you ever come up with more creative names," he quipped.