Edit a child post from front-end

Hi,
I'd like to edit a child post from the parent front end page.
Attached a screenshot of what I've been able to do so far:
1.Create the parent display
2.Create a sub view to list the children and display them
3.Adding a button (orange) at the end of each line to go the Edit Form.
When I click on my Edit button, I don't know how to display the edit form of the "current/in line" child…
When I insert the CRED shortcode in the page, the option "Modify the actual publication (in the loop)" doesn't work.
In this hierarchical display I don't know how to indicate to the edit form which post to edit…

Thanks for your help,
Julien