S.H.
Wow what a hero you have! Lucky woman you are...
I think, writing him a letter is great... and very touching...
And perhaps, you both can take a photo of yourselves... sitting on the couch at home, just casual... and hanging out all relaxed... that would be cute. Just a simple home photo done with a remote or timer on the camera, and you two hanging out lounging... with your big tummy...
All the best,
Susan