when did it sink in to your spouse/bf/partner than you were pregnant?

I'm 6w1d and I know my husband is ecstatic , but I don't feel like it's fully sunk in yet for him! He doesn't understand the tiredness and the moodiness and the crazy hunger I have! I think to him it's all fun and games and not really a reality yet lol- if that makes sense! I have my first ultrasound in 6 days and I'm hoping that seeing that and hearing the heartbeat will tell him that he's REALLY having a baby! Lol. Anyone's husband just not seem like they think it's reality yet?