I am wondering, since Ellie ruined all the plans by being with her dad, if the "guest" was a family member as her dad or brother. Ellie's Instagram mentioned happy birthday to the best brother on the weekend. Makes sense for the spending time with dad and a surprise trip. Perhaps Ellie wanted to show her pup when she was dropped off at home. They would be two people she would not want to see the state of the house since, in reality, it is dad's investment, not Wilkes. She also said something along the lines, "it doesn't matter how long I have known him" which sounds like it would not be a casual acquaintance of Ellie bringing The Wilkes to tears.She didn't mind Ellie's friend being in the house in this video
I know, too much time on my hands to evaluate situations. The truth of being actually I'll and too much time in bed trying to take my mind off of my pains lol. Truth though.