Fall by Katherine Rhodes

Some demons don’t bother to wear a disguise.

The Pipeline has finally been disbanded and Benjamin is back with his sister.
But not everything is rosy. Not by a long shot.
There is only paperwork left between the kids and their adoptions, but Paige hasn’t been herself. Wren and her men know that’s not like her. Paige is proud of her track record as a child advocate, and for things to be going this wrong, something is up. Wren is horrified when she finds out what it is, and isn’t sure how to help.
Fischer, Lincoln, and Bastian have begun to realize: there’s a reason they are bonded to Wren, and the three of them hatch a hare-brained scheme to use their Hades-bound powers to bring temperance and justice to the sinners who are out of control.
The demons that have started to come through the cracks in the After are becoming more than Miriam and Laxmi can handle. More than once they have had to ask for Ellie’s help, but a direct attack on them changes the course they think they are on…
… and adds another to the group.