Hide and Seek, anyone?

Last week my coffee buddy came over for our weekly cup and chat, and brought her three girls with her. The kids were happily playing while we enjoyed our coffee. She left at 5:30, at which time I fed the little fellow for 15 minutes or so. After he was done, I went to use the facilities (2 cups of coffee will do that to a person!), at which time my 3 year old daughter poked her head around the corner and said she was playing hide and seek with my friend's three year old! I had to tell her that her friend went home, so she can come out now. She wasn't disapponted, just smiled and went about her business! I wonder how long she would have hidden?