[... Actually. She knows he's busy thinking up something but she's actually reminded of a really terrible thought she used to have that involved Koji and now seems like a good enough time to mention it? But not quite good enough that she'll stop, because for as quickly as she teases she goes right back to it. She can't give him all day to think when she really just wants to swallow. She likes that his cum isn't as overbearingly thick as Yamato's.
Which she'll never tell their brother, of course.]
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[... Actually. She knows he's busy thinking up something but she's actually reminded of a really terrible thought she used to have that involved Koji and now seems like a good enough time to mention it? But not quite good enough that she'll stop, because for as quickly as she teases she goes right back to it. She can't give him all day to think when she really just wants to swallow. She likes that his cum isn't as overbearingly thick as Yamato's.
Which she'll never tell their brother, of course.]