D.C.
Sorry but i sounds like you are doing to much explaining. Tell the children THEY are going on a vacation to grandmas house. Buy them each a new back pack and put some important things in each one. A favorite picture of you and your husband. a tshirt that smells like your perfume a favorite book or movie some favorite snacks And new game they never played before, and a few small silly presants all wrapped up so they have some thing to look foward to each day. And then enjoy your selfs. Dont call every day call every other day trust your parents to take care of the children. If you let the kids think they are going on an adventure not you leaving them it will be much easier for every one. I know for a fact I did it with my son who was glued to me at the hiptill he was 10. You could even get a little voice recorder and record a message of love or read a short story. Then if they miss you to much hearing your voice will help. Good luck