Mood:  not sure

I am just a little sick today.  I have been sick for a few days now and today has been rough.  My cousin and her sister in law are here from New York for the holidays.  Her mother died September a year ago so this time of year is hard for her.  This is the second Christmas with out her. 

I am dreading the kids leaving tomorrow.  I am more dreading their dad being here to pick them up.  I can't say what my son has told me because then he will get yelled at this weekend and get in trouble and be miserable.  Which so isn't fair, I mean why should he pay for telling me something that made him cry so much and that really is against the law.  You can't say you should have killed someone... last time I checked.  Then he told my son "now you can go home and tell your mom that and see what she has to say about it". 

I don't know what to do about it.  I don't want the kids to never see him again but I also don't want him to be abusing them like this either.  I also have to make sure that I have enough to make it stop or else my youngest son will just really get yelled at and mistreated for "telling" on his father. 

Does anyone have any suggestions about this?  I don't want their dad to know he told me cuz he will get in even more "trouble" with his dad and I will feel like that would be my fault but I can't let him do this to him either.... Any suggestions???