"Spaceman?" Donna called softly as she walked down the hall to the console room.
"Ah, Donna!" Ten extended his right arm, Star in his left. "She said her first word! TARDIS! She definitely is part Time Lord!"
Donna tried to smile, but she couldn't. She knew he wasn't going to take what she had to say lightly. She had prepared herself for his disappointment. His anger.
"Right... I just... Remember that thing I had to tell you about, that I mentioned yesterday?"
"Yeah?" He asked, raising his eyebrows in concern. "Donna, is something wrong?"
She bit her lip to stop the sudden trembling. She couldn't just break down while telling him: that just wasn't Donna.
"Donna?"
Finally, she looked him in the eye and told him what had been on her mind since that conversation they had while looking for Susan: "I'm leaving, Spaceman."
What? Donna was leaving? "But... Why?"
"Shaun obviously came back, and I need to set things straight with him. And Gramps... He's not going to last that much longer, and after that, I don't know if I can even come back..."
Silence grabbed the air, holding on for what felt like forever. She was leaving. There was absolutely nothing else to be done. Donna Noble was leaving the TARDIS for good.
"Oh..."
Donna walked over and hugged him. "Doctor, just know you're still my best friend."
Yeah; but best friends didn't just leave like that, did they? "And vise versa, Donna Noble..."
Soon, she backed off. "Well... I should go then."
He reached into his pocket, pulled out a key on a string, and held it out to her. "In case you ever change your mind."
Donna took the TARDIS key and put it in her pocket. She knew that someday she'd look back and regret it, so at least she could come back. "Tell the others I said goodbye..." She walked off to the door. Before opening it, she turned to the Doctor. "Thank you, Martian Boy."
Martian Boy. What she called him when they first met.
And what she called him the last time they met.
Oi, bit short, wasn't it? Sorry! Will try and make it longer next time. Anyway, what do you think? Feels-y? Thanks to all those who reviewed, and please keep them coming!