Serial Killer Nut Case: Possible poisoning of mangosteen skins - attack on Xia

I attached a mangosteen poultice to Xia's arm as she had began scratching the joint. It may be that these skins have been poisoned as unusually this created a slight (for now) red mark on her arm. This may be temporary in which case it is just an unexpected effect of these skins. However this is the first time I have observed this apart from the times Serial Killer, using my maid as a vector, had poisoned the skins leaving a livid red welt on her face - will know in time. Maybe I am being jumpy after her very close lost of life just two days ago.

Reddening of Xia's arm