Manon was a very private person who preferred to operate alone. To venture to Alenroux by themselves is no oddity, but to stray into the wood would require dire circumstances.

[ it's hard to tell what she's insinuating: maybe that Manon was lured? or that something else caused Manon to go afield? ]

If there was time for consideration, they would not have gone on their lonesome. Yet there are none others missing, and none associated with Manon or their work.