Because there is a time and location for everything ^^;;
A lesson he seems to be teaching Kongou rather well at the moment. Thing he's not stalking, peeping, or setting up hidden cams to film her at all hours or something he's just taking what she herself insisted upon to the logical extreme in what seems a teasing manner. In all honesty Kongou really was asking for this, but I kind of doubt she will again in the future... It honestly almost feels more like a "told you not to do that" candidate then a shitty admiral.