And he is twittering like nothing happened..
If Jenny takes him back and he harms any of those children, it is her fault as much as it is his. She has officially been warned that he has the capacity to be violent. It sounds like Jenny is at her parent's house now, so she and the kids are safe.
Please don't take him back, Jenny. You have your family and you have great earning potential. Move on and give your kids the violence free life they deserve.