Last I heard there was some court drama that was resolved in Nikki's favor. I think Lisa filed a restraining order or something which Nikki contested and the judge threw it out or something.
Big fan of both girls as performers but Lisa seems to have a bad industry rep. Since she retired other people in the industry have come forward saying that she treated a lot of her peers like ****. I think they were silent before because Lisa was such a big an influential figure in the biz and they were worried about career fallout if they talked crap about her.
Of course the adult industry is full of drama in general so who knows how accurate the criticisms are.