New adventures!

[Painter]

I'd confront her with that, Si. Let her know that you see right
through her attempts and stop this exploitation of the kids before it
takes root.

I'd write her something very briefly and say, 'If you have questions about what I do and who I see, please ask me and don't use the kids to pump me for information. They should not be used as messengers or investigators.'

And I wouldn't worry one bit about how she reacts, as long as it stops.

I have myself been in the situation where a stepchild arrived with a camera in his backpack, courtesy of his mother, who wanted him to take pictures in our home and bring back to her. The camera was confiscated and delivered back to her with a clear message of what we thought of spying.