I think Lilith doesn't want the things happened in the book to happen so she acts opposite of the Lilith in the book. She's either a reincarnated one (though this is unlikely) or she somehow learnt this prophetic writings from somewhere.
Or the real lilith and a reincarnated one share the same body
Also seems like the Lillith at the party is more interested in a different prince than the playboy.
I think Lilith doesn't want the things happened in the book to happen so she acts opposite of the Lilith in the book. She's either a reincarnated one (though this is unlikely) or she somehow learnt this prophetic writings from somewhere.