What do you think about me being really grumpy throughout dinner?
I'm confused by why you would want to be grumpy. Is this something that you often do?
Not really, but my wife is annoying me.
You shouldn't try to make things worse during dinner. You're expected to de-stress and have good conversation while everyone sits down and eats. Being grumpy makes you grumpy and the other people may get grumpy too.
It's okay, we have separate bedrooms. I don't need to listen to what she has to say.
It seems like you and your wife are going through a difficult patch in your relationship. You should use dinner time to engage in a conversation that can improve your bond.