This girl I've known for a couple years now 'forgot' to run an errand I needed her to do. Essentially I needed her to deposit an important sum of cash into my business account by Tuesday (I'm the manager of my family business). I was unable to do it as I got the money Friday night and had a flight overseas Sunday (all banks closed).

I told her if the money isn't in on Tuesday I'm in deep shit (I'm not), so she knew it was important. Just received a message few hours ago saying she forgot and will do it tomorrow, no apology.

Even if it doesn't actually bother the business much, I sense she is using this money situation as a power play to test me.

Never done anything serious with this girl, I like to have her around to experiment with game theory, so invariably I'm gonna get a shittest once in a while.

What should I do about a shittest in which she holds some level of power (the money) over me. So far I've just 'seened' her message on FB.

Cheers for any input.