[There's a potentially very mean undertone to that, but Time knows what Sebastian's like, so. Now, this probably means he loses the one-sided challenge, but: Sebastian's way of escalating is to simply widen his smile enough to bare his fangs at her. Well, they were speaking of punishment...]
I am not feeling charitable, myself. ["I'm upset )':".] Based on that, would you still say today is a good day for punishment?
[Because, you know, he actually feels like being mean. Which is to say "punishment" will just equal taking away all the cake, or something along those lines.]