[ Sharp, because she's not wrong and he hates that she's not wrong. It makes him feel like he needs to prove himself and soon. Snap some necks. Rip some throats out. Show those Summers sisters that he is far from the neutered puppy they believe he is.
Not now though. Not yet. No need to bring out the torches and pitchforks prematurely and so he sets his jaw and keeps his relative cool. ]
Wouldn't do me much good to take her out here, would it? No bragging rights, for starters.