I would tell them closer to the actual date as KML said
I cant remember exactly the way we did it but I think they realized something was wrong while he was still there I think honesty is best- they know the truth anyway No blame But the truth Your dad has decided to move out but we both love you very much we cant protect them But they will know you are there you are not leaving ect….
Me being there and taking on rolls of both parents was helpful my kids are both doing well they are 17 and 23 now good students drug free and good people- no contact with dad for 9-10 years no contact was a blessing for us none they don't ask about him anymore For my situation- especially after xh went dark with no visits I told them he loves them but he is in MLC I told them the truth If he gets better he will visit again they seemed to understand
In some ways it was a huge relief to not see him everyday with his crazy shut down -not talking to me behavior
married 14 years H 42 bomb 2/07 IDLYA D final 3 /09 M ow D ow