Debbie Rowe may have signed off the kids thinking that they would be loved and well taken care of by Michael. No one expected Michael to die so soon.

: So she 'disconnected' herself from the situation.
Perhaps with the prospect of the children going to his elderly mom with Joe Jackson in the picture (knowing that Michael would not want the children under his care nor in the same room as) or Diana Ross....again aging and probably lower on the totem pole of possibilities (although the lesser of the 2 evils)....she decided to step up to the plate and try to give these kids a fighting chance at a hopefully, somewhat normal and safe life?
I'm still on the fence. I can't say that it's solely greed that is motivating her.
She was paid well to be a 'mother' and give him kids......I don't think being left out of the will plays into it....I don't think she expected anything more.
I'm still on the fence.
*That is if they are her children and she's not just a surrogate/incubator......but even still...