compared to if it wasn't a relative. Sasha and Willow are best friends. You don't get to be just a little honest. Sasha is smiling in Willow's face--knowing all along that she slept with Michael.
Michael and Chase rebounded from the affair. They are no longer best friends but they are friendly. Sasha and Willow might survive the indiscretion.
Neither Michael nor Willow can truly move forward without all the cards on the table. I mean they both agreed no more secrets and each of them is keeping a whopper.