First of all, I think that you should have a talk with them. Allow them to express their feelings openly. Even if you don't like their feelings, try to be understanding. In turn, explain your own feelings.
If they are not happy with the decision, they are entitled to feel their feelings. Acknowledge that. Let them know that it is okay to feel the way they do. The worst thing you can do is to try to strongarm them into feeling how you want them to. This is not the time for "because I said so." (Though in my opinion, it never is.)
After that, explain the situation to them. Let them know that although it may be a difficult transition, it can be made somewhat easier by keeping the lines of communication open. Throughout, remember to be there for them. Remember to respect their feelings as they should respect yours.
Also remember, your children are people, too. It doesn't matter how old they are, they have feelings just like you do. The difference is that they are younger. At their ages they are still learning how to deal with new emotions. You, on the other hand, have had considerably more experience than them.
If you keep all this in mind, things should be fine.
Last edited by hoaxie; 10/23/08 08:31 PM.