Actually on third thought, I've added a sexual violence tag because the entire relationship is so far based on blackmail, even if the series makes light of it.
I wasn't sure at first if this is going too far or not: For the intended audience her coerciveness is just presumably just a turn-on or something...
...but I'm really dubious about applying that sort of super-questionable audience-dependent implied-consent logic, and I'm fairly certain these events comprise statutory rape at the very least. Possibly for the actual cats involved too, come to think of it.
It's still not what people normally have in mind for the tag, so I'm not 100% sure. It is not strictly impossible my literal-mindedness may be getting the better of me here (factually it is gratuitous sexual violence: Therefore, sexual violence content tag), but the argument to the contrary ("it's fine because we're sure he really likes it, even if he said he didn't want to") just rubs me the wrong damn way.