After my experiment with my Lust Sigil, and having Lilith in my daily life, I think that she might not help as much if she has a personal interest of the magician herself, making it a “conflict of interest”. But she do help to boost your self confidence around women anytime.
The deeper your connection is to a Goddess like Lilith, and what kind of relationship you have with someone like her, might make her less inclined to aid you within the Lust Current. That doesn’t, necessarily, have to mean it’s bad for you, or that she want you to fail with the opposite sex. But she do have the capability and the ability to do these kind of things, merely as a demonstration than doing it by the command of a black magician.