I've been with my OH 10 years too!
Doesn't matter how much time you spend with them, they never seem to 'get' us women. Lol.
That's really great news that he wants to make you happy though. But I absolutely agree, I would always want my OH to want another before we had one... Actually, now I'm thinking about it, he says he doesn't mind whether we have more or not... He always just says 'if you get pregnant again, I'd be happy, but if you don't, I'd still be happy'.
So who knows what's actually going on in that head of his? Lol.
I guess I feel the same way though, for the moment. If it happens, I'd be over the moon, but if it doesn't, I'm already happy with what I have so I think I'd be ok with it.
I'm always a little disappointed when I build my hopes up after knowing we did it around my fertile time and AF still shows though.
Definitely have a good talk with your husband though. Good communication is everything!