Supergirl - Kryptonite Test (Patreon)

It's amazing what you can buy off the internet these days.  This stuff even comes in a lead-lined box, which makes it undetectable by X-Ray vision.  I had no idea whether it would work like in the comics, but when I showed it to Supergirl the effect was pretty instantaneous.  Her legs went to jelly and she just slumped unconscious on the floor!

The documentation that came with it says she will be fine again when I remove it to a safe distance - but I honestly am a more than a little worried she will kick my ass when she wakes up.  Any ideas how to handle this?