Layer Two: Boss Cao always felt that girls who threw themselves at him weren't exciting, but stolen married women had the real flavor. Making Geweil fight a bit for shares would deepen his impression of LCE and make him more willing to support LCE when appropriate.
Layer Three: The Protector of the landlord's house was bullied by the landlord's simpleton son. Having been wronged, could the Protector not ask the landlord for a raise and a reimbursement for medical expenses? Geweil's people have caught Forbes' attention, and he's currently butting heads with Forbes! Niu Sen has been dragged into the water by Geweil!
As for whether Niu Sen will help, that's a different story, but CEO Cheng has found a way to help Gru.