Nail polish

How do you respond when your three year old walks into the kitchen and says, "I'm sorry momma," followed by, "I'm so so sorry"? 

Well, I attempted to stay calm and tried to get Annie to tell me why she was apologizing, but the tears just started flowing and all she could do was pull her hands from behind her back to reveal nail polish covering two thirds of each finger.   Then it was hard not to get angry/ laugh.   She had just asked me to do her nails and I said not until after we go swimming.  We are really struggling with her learning to wait for things.  After making sure the furniture wasn't paradise pink too, we spent ten minutes removing the nail polish.