I think you should ask him to please keep an open mind about what is going to happen and how it is all going to work, and that children require a willing flexibility and enormous patience.

The other thing I want to say is, "Don't borrow trouble." There's no need to panic about an off-handed comment in a casual conversation about a topic that is all theory for you at this point. You need some more information before you can draw any conclusions about how it will be.

Karen