Given that I have a ginger jar in my bedroom which has had as much as $500 in cash in it, this makes perfect sense to me. Every week, I dump my loonies and toonies into that jar. Every month when my pension comes in, I dump all of the cash in my wallet into that jar, and when I go on vacation, I use the cash in that jar for my vacation spending money, everything she said made perfect sense to me.
Given that her income is substantially greater than mine, I would expect that her "ginger jar" has a lot more cash in it than mine before she leaves on vacation.