Changing the manager of a profile?

So I started this tree for me, but it's also for our kids, so they can see how all their families fit together, as they have four parents (my husband is their bio dad, and we co-raise them with their bio mom and step dad). I had added a bunch of their bio mom's family, and she recently joined so we would like for her to be able to take over her family... is there any way for her to become the manager of their profiles without my needing to delete the ones I made and her re-entering them?

Jennifer, Add her to your family group but she can't be the sole manager.

I want her to at least be able to work on them, so I'll do that... it's fine if she isn't the sole manager, as long as she can make edits.

In profiles that you manage there's option 'Add Manager' under 'More Actions'. There's no mass add, it needs to be in every profile.

* needs to be done

Thanks Liivi... I don't mind if it has to be done on every profile as long as she can work on them too....