I've been thinking.
KW posted some memes on facebook about "what's done is done and what's gone is gone" and another one about relationships ending, and another one to the effect of being lonely and forgotten about. All pretty revealing of her state of mind in the 4 days before Thanksgiving.
She knows at some point EK is (ab)using Mariah for his sexual needs. Her true feelings about that we don't know, she may have gone from thinking it was amusing or even a turn on ( :sick: :sick: ) one time, or even as a punishment to Mariah for being a beautiful 'blonde' baby who got lots of adoration and attention for being the first or only granddaughter, to in the end feeling Mariah had replaced her. Especially if her and EK were fighting, which the memes that week allude to.
Her pink hair bow (I know sorry
! I won't post it again) looks like an attempt to become Mariah.
What is going on in this picture?
Why is she feeding the doll for the picture? Mariah doesn't want her to. Everything about her body and face speaks to her feelings about her mum doing that. She has switched off, gone blank. Mum is oblivious, the picture is about her.
There is one thing that KW said in the missing appeal when asked what Mariah means to her:
"
she's got the personality of make you laugh [...] she knows how to make your day brighter".
That is to say she treated only-just-3-years-old Mariah as knowing the needs of those around her. It's seeing Mariah as mature.
I can see motive for her wanting to hurt Mariah in a flash of temper, along with other scenarios where Mariah dies at the hands of EK.