I know Trinity seems a bit brazen but she’s actually a practical girl who isn’t ashamed of herself; she’s a witch, a pagan and not bound by the petty morals connected to what everyone knows  everyone has. For her it's more about intentions than appearances so as long as Lex doesn’t shift from being there to leering; oh and if he tried to get grabby he’d need to go Dustboy or be broken into little pieces LOL