Zach hardly thought it odd for him to set up a romantic setting for them. He was romantic at heart! He cared for her, and those feelings were not separated from his sexual attraction to her. In fact, if anything, the two were bundled deeply together. And the sex they had had on both occasions had been full of feeling for him, even if different aspects of those times may have implied not.
He cared, he liked her, he wanted to do things her way. And when her way meshed with his so well? Oh well-matched, that reminded him of things other than romance, things he had thought more likely to match since her reaction to his one joking suggestion...
Both were incredible though! And both together in the same person even more amazing.
"We can do it another time?" Zach asked. He did not imply - and tried to keep it clear from his current level of barely thinking - he disliked the current situation at all. No, he loved it, and that was why it was so impossible for him to leave for dinner, knowing it was right there. But he wanted them both, it all, and Zach wanted that to be clear too.