not that
1. Although it isn't the case that. Not that I expect you to know the answer to this, but why do you think Mom ever married Dad to begin with? My husband watches a lot of trashy TV at night—not that I don't have my guilty pleasures, too, mind you.
2. Not very (especially compared to how it is perceived or said to be). It's a beautiful restaurant, but the food wasn't that good. He's not that arrogant—it's just an act.