Let me explain to you about vindictive @ssholes (I was one at one time). Your H will do everything in his power to control you. Since you are taking the initiative to file for legal separation, and he can't do what HE wants, he will try to make your life hell..I truly believe he will tell your kids that he doesn't want this and it is all your fault. He will probably lie and make you look horrible to them (hoping to turn them away from you). My advice to you is to tell the kids yourself. Your H is no longer a sane and resonable person. I'm sure they are wondering why daddy isn't living at home anymore. So tell them the truth. Tell them on YOUR terms. The way your H is acting, he doesn't deserve the right to be there when you tell them. Your job is to protect you and your kids from this point forward. My personal opinion is he will do more damage to them by telling HIS version first!