Martyrs

As the mother is kicked into the pit, a body flinches to brace itself for the impact of the mother falling on him.

When Lucie and the remaining corpses are thrown into the hole by the people in black, the son's pants appears nearly clean, despite the fact that Anna had dragged him through the mud in the pouring rain the night before.

Weeks (possibly months) into Anna's capture, well after they've shaved her head, there's a close-up of her legs during the sponge bath scene.

They are neatly, smoothly shaven.

Aside from the fact that this would not have been a priority in her situation, she could not have done it herself.

As for the captors, there is no reason why they would've shaven her legs, considering the way they otherwise treat her.

It is also not necessary for them to have her legs be shaven for the final skinning.