Is this from "THE SHADY PLOT" then ans is :
when she knew dat d ghost from the oujia board was a lady n was telling hallock a cheater she thought dat hallock had something with dat helen the ghost so she decided to leave the house.
Also one instance is dat when she was telling different kings n personality names n when she spoke helen of troy she corrected herself means she didnt wanted hollok to meat her. thus she was jealous.

I m sorry if this I mean ur ques was nt from shady plot