Front End Posting

I’m looking for a way to allow non-admin users of my site to be able to make and edit their own posts and pages on their personal user section. Right now I’m using the WP User Frontend plugin, which is exactly what I need in terms of allowing users to create pages. The only issue is that I want any newly created pages to become a child of the page that created them. So for example, if I have a user page at:

mywebsite.com/userA

And they make a Post 1, the URL of Post 1 should be:

mywebsite.com/userA/Post-1

and not (as it currently is):

mywebsite.com/Post-1

Do any of you know of any plugin or modification that I should make to allow this functionality? Any advice is much appreciated.