DP AU where Sam experienced residual plant powers and her rationale for using Danny's power for her own gain/wanting him to be Danny Phantom despite seeing him content and healthy without them earlier in the show came back to bite her in the ass; optional: some logical throwback to humans being unable to host ghost powers for long from Doctor's Disorders if that's what you're into

"How long have you known?"

Sam jumped back from the pot she was currently standing over. The flower continued to grow taller as purple petals bloomed. She turned to see Danny standing at the open door the green house in her backyard.

Sam sighed. "I didn't know how to tell you. I didn't remember anything, I swear." she said firmly.

Danny's lips formed a thin line as he walked over to the table and narrowed his eyes at the plant. At a first glance, the flower appeared normal… organic. He reached out and felt the velvety petals between his fingertips.

"No ghost sense," he told Sam. He continued staring at the plant as he spoke. "I guess that means these powers aren't derived from being possessed. Which means you should be healthy, at least."

"Danny…."

He closed his eyes and took a breath. "Why didn't you tell me? You don't trust me?"

Sam gripped his closest arm with both hands. "Of course I do! I should have told you. But I was scared."

"I told you everything about my powers from day one," he said quietly. "Did you think I'd suck you into the thermos or something without trying to reason with you first?"

Sam bit her bottom lip.

"That's what I thought," he said.

"Let me explain!" she said. She squeezed his arm, but it was the way her voice wavered as she spoke that made Danny finally look at her. "I wanted to learn to control them first. I wanted to prove to you that I could and then maybe… you'd let me keep them."

Danny's eyes widened as he tried to pull back. "Sam-"

"Please hear me out."

He stopped, realizing she was holding onto his hand and gently squeezing again. Hesitantly, he nodded.

"The world is in constant danger. Think about what we could do to save it now! With your ice powers and my… plant abilities, we could help to save the environment."

Danny quirked an eyebrow at her. "You've really thought this through then, haven't you?"

She nodded slowly. "I'll even go see Frostbite with you if it makes you feel better. I haven't been floating randomly or falling through the floor either! Scout's honor," she said, holding her hand up.

Danny chuckled. "You make a pretty convincing argument."

Sam let out a breath. "You're not mad at me?"

"Do I think it was stupid not to tell me? Yeah." Sam winced at that. "But am I mad? No. I think you had a right to be a little scared. Not that I'd put you in the thermos, but I may have jumped the gun and spliced the powers out of you or something."

Then it was Sam's turn to laugh. "So we can try this?"

Danny smiled and took her other hand in his own. "I'll take you to Frostbite just to make sure you're safe. Then… we can discuss it."

Sam beamed before launching herself into Danny arms. He let out a light "oof!" before Sam recoiled, her face particularly pink.

Danny chuckled and pressed a light kiss to her forehead. "I think this means you need a hero name."

"Plant Girl sucks." she said.

"Poison Ivy?" he asked.