Well it was relevant to her in the sense that Belle had displayed horrible double standards by raging at her for days, then doing similar but worse to Leanne. And no-one except maybe Whitney had challenged her behaviour whereas the same girls had been highly critical of Lucinda. That was her whole point.
So yeah strictly speaking it was Leanne situations, but it was relevant to Lucinda’s experience too.
I think after the recoupling speeches and the immediate drama after that, her and Sean had a chat and agreed they would leave things.
However then Jessy popped up several hours later to start an argument with Lucinda over what she had said. And then after Sean challenged Jessy on it and Jessy squeezed her tears out Belle kicked off again and was shouting pretty nasty things about them. Sean and Lucinda didn’t say a thing to her at that point.
And even during that recoupling before Lucinda made her dig about Belle/Scott situation, Belle had already made at least one snarky comments towards her.