If you weren’t offered money to watch your friend’s children, would you have watched them anyway? It is understandable that you are pissed because you were offered the money and now you are counting on it, however, what will you do if the money never appears? Will you end the friendship? Your friend might be worried/concerned that you are going to hate her for not coming through with the money. My advice to you is this- if you want to keep this friendship, then you need to call your friend, (if she doesn’t answer, then leave this as a message) say to her, “I really want to talk to you, I want you to know that if you can’t come through with the money, I understand; I know that sometimes these things just happen. Please know that I still love you dearly as a friend, and I really want you to call me back.” This way you can at least put an end to this money situation. You will have to accept that you will probably never see the money, but consider it a lesson learned- if you are going to do something for a friend, have it be a favor that they can pay back with favors to you, not money.