I'm not sure if the emails could be used in court. That would be a question for your lawyer if you don't already have one.
So i take it your grand daughters baby was already born? was the the father put on the birth certificate?
If he was, then she could go after him for child support since it was his baby, even if you need to have him do a DNA test prove it. but also yes, he could also file for joint custody of the child. unless maybe she now lives to far away to really make that happen.




