Yes, she did say dead body. The more she said it out loud, the more it set in, didn’t it?
Vinzent Mayer “I’m sorry to hear that, then… That’s very understandable if you don’t want people to see it, but from that conversation alone… I’m surprised you’re keen on keeping it rather than destroying it. Unless it is because it’s the… Only thing you have left of your mother. Your father on the other hand, he’s… I don’t approve of what he has done. No matter what, I can’t just wrap my head around it.”
The words of sympathy were partially lost on Atsuko, just because the thoughts of others genuinely effect her that little; but still, they were appreciated. It was good to hear from an unrelated third party that yes, she was right to feel the way she did. Because papa certainly didn’t agree, and they had their fair share of fights over this painting. And about everything leading up to it.

“…I don’t approve either. And that’s why I absolutely am going to destroy this painting.” The thought of keeping it sent shivers down her spine. “There just hasn’t been time, space, or opportunity. How am I to erase this thing without leaving a trace in this cramped room full of letters?”
Speaking of letters, she was growing increasingly irritated and frustrated with her search. She would have preferred to find her own, but even finding someone else’s, just to get them out of this car…

“…Don’t concern yourself trying to understand. Why papa did it, I mean… I understand him better than anyone, and that’s only through… a lifetime of being his child.” She knew her role in his life better than anyone, and she didn’t have the time, energy, or desire to even begin to explain it.
Perhaps she would simply have to write her letter after all. Papa is probably worried.