"Alright, if you're sure..." She sighed. If he thought he had convinced her nothing was wrong, he was incorrect. But she doubted that even if she pushed him she would get anywhere, so she dropped it. But there was no doubt that she was going to ask Dark to glance back occasionally while driving to see if he actually did work on homework in the car.
"You are welcome," Dark said, sitting down next to Daizi, who kissed his cheek and then whispered to him her request about making sure Xander actually did homework in the car, in Arabic, of course. She didn't use Xander's name, and drapped her arms around his shoulders, being careful to add, act like I'm flirting with you so as to not arouse suspicions. It probably wasn't her best move as a foster parent, but, honestly, if Xander could be sneaky, so could she. He was a bit confused, but went along with it. Her spy act was endearing enough to make him ignore the ethics of using the language barrier to their advantage. He actually kind of laughed, which might've made her desire to act like they were flirting actually work, and... brought them dangerously close to actually flirting.
Instead they separated, not wanting to gross out the twins, and Daizi decided to take a risk and take some of what Xander had said to heart the day before, saying, "Next week we're going to try eating real, solid Middle Eastern food again. I want the baby to get to know her heritage," This wasn't a vindictive act, she was trying to show she was listening to him and cared about what he had to say. He didn't want her to make him walk on eggshells with how she avoided talking about the baby (although she still firmly believed she wasn't the problem there, because she was just trying not to upset the twins), so she was testing the waters by just casually talking about her.