Hello Mic, first I want to say that l'm very sorry that you have to give up your job with kids on your farm. It seems you are going through, a double loss.
Will your H buy you out of the home? He can't just say it is his without compinsation/negotiation right?
As far as phone calls go, if the kids want to call H, I give them the phone to do so. When he calls, I give them them the phone to talk to him. The communication is really up to your H, IMHO. Also, now they facetime and same rules apply. I know your kiddos are younger, so not sure if this would work.
M45 H46 M16 yrs D17, D10, D7 DB 1-23-2014 H filed D 2-14-2014