This is Lulu's back side- she had her on the rug, diaper nearby, getting her ready. Are you laughing yet? I was.
My guess is she realized she used too much and didn't have anything to wipe it off of Lulu so Sadie got Lulu's backside down her back. Poor dog- she didn't like getting a bath afterward.
oh, and yes, I'm sure this is where she left the cream after she decided she had used enough. Good thing this is old furniture...I had tears in my eyes I was laughing so hard. New furniture- I would have been upset.