Um... Why do you believe she wasn't onboard with it? Or that $18k was an amount of money that represents an unacceptable risk for them?
I didn't see anything in the article stating that she disagreed with the decision. Or that that amount of money will actually be missed. 18k is peanuts to many people.
Business savvy people who have a LOT of money often have a "risky investment" fund. Hell, I have a very small risky investment fund myself and I only have a moderate amount of money.