Vampire council hears that there's a vampire/human relationship not only going on, but being rather indiscreet about biting necks in public, so they go to investigate.
Cut to them finding the couple in question in a park, teeth in neck, for all and sundry to see.
Cut to very embarrassed vampire sporting huge hickey on their neck from where their extremely bitey human partner has been chomping them, with said human partner completely unrepentant at their side.
Vampire council: ...okay, but you still shouldn't be doing that in public.
Vampire council: At least not to that extent.