mama, clean up!

(says nj) I hear mama being shouted from across the house, I look around the corner and nj comes running from our bedroom. he says something about dotty and leads me to her and her bed. she's been tearing out the stuffing and she did it again, it was all over. he points at it and tells me to clean it. thanks! he said it several times today. when he spilled some water from his cup, when I asked him to put away his toys, when he got dinner on his tray... I don't know where he learned, "mama clean up", but it wasn't from me! I haven't heard him say, baba clean up!