And is only about 3-4 hours away from arriving? 
There's a bit of a back story with his stb ex-wife and I (isn't there always?!) but he's now coming up for a long visit of about 3 weeks to see us and DS. We haven't had a proper visit since before DS was born (about 2 yrs ago) and I'm just so excited that he'll really get to know DS properly!
I think DH has missed seeing him too, and it'll be lovely to spend time and catch up.
So actually, I'm so NBU, but I am BU to be a bit teary before he even arrives! 