It's really not important.

[Though she says it in a dry enough tone that her real meaning is probably more along the lines of it being quite personal, thank you.]

I don't even know if I'm going to use this. But it won't hurt to have around just in case. I'd hate to get started on a painting and then have Rick happen by and see it while I'm out. [Just as a totally unbiased example of a disaster that could befall an unattended painting.]