Let's cut her a bit of slack. She lost her mother last year; she made a mistake with weed that cost her the biggest opportunity of her track career so far, and recently revealed she was stolen from and abused by her ex girl friend. I can forgive her attitude and cockiness when she's been through that sh*t.
On that relationship, there's been a lot of chat about this online, but it would appear Janeek Brown was the ex, and Brown has posted a vicious video online, full of "bumbaclart this, and bumbaclart that" which really doesn't paint her (Brown) in a good light. She comes across as extremely aggressive and I can totally believe she abused Sha'Carri.
It does also look like Sha'Carri has had implants too, unless its fat gain from not being in sprint form. But it all kinds signals she wont be running any time soon, so don't hold your breath.