Like it's not your fault in the first place?!

[ SOMEONE HAD TO SAY IT ]

Look, I'm just saying - she's your Master, but Ai-chan's a girl, too.

[ whatever that's supposed to mean??? Nagiko's looking pretty serious (or just intense, it's hard to tell with her) about this, either way. ]

You've gotta have a bit more delicacy about it. At least next time, don't bite half her face off when you're doing it!

[ Never mind that Ai was the one who started it............. Hold on, why is she so sure there's going to be a next time??? ]