Why Abigail eat diamonds?

[BokWaffle]

This breaks my brain, but look at the text. This is after I gave her a diamond. I used the name cheat since I on iPad. It makes my brain hurt.

 

[1Stardewaddict]

She says that when I give her poisonous stuff

 

[Starry Junimo]

I divorced her today, wiped her memory, and I gifted her a diamond!!