AITI for not caring? She agreed to work for that rate, and didn't negotiate for a percentage of the actual profit, but is mad now about how much it made? Most of us don't make a percentage of our company's profit and have to work for what we agreed to on hiring.
I know this is an indie film, but Hollywood is notorious for "creative accounting." You gotta get that shit in writing that you'll make X% of the gross, rather than complaining after the fact.