Pablo called this morning to tell me this story (I'm at work):
Isabella and Simon were in Simon's room and Pablo was in our room when all of a sudden, Isabella came running into our room saying that she had just smacked Simon and then said that she was going to her room (she was punishing herself!). Soon after she shut herself in her room, she came out and told Pablo that she had forgotten to say sorry to Simon. She ran over to Simon, apologized, then put herself back into her room for her time-out. She stayed in there for quite some time too!