Upon hearing Ethan desperate words Serenity couldn't say no at that same time she doesn't know how to talk to her grandmother about it.
However she put the call on hold and spoke to her grandmother.
At that moment her soft voice came through the phone, "I'll handle it, Ethan. Just hold on a second." There was a muffled sound as she passed the phone to her grandmother.
"Ethan," the older woman's voice carried a weight of authority laced with gratitude. "I've heard everything Serenity said. You've done more for this family than we deserved. I give you my word—the Silver family will never know what happened at this mansion. You are a real man, Ethan, and you have my respect."
Upon hear what Serenity grandmother just said.
Ethan nodded even though she couldn't see him. "Thank you. Just make sure no one slips. If the Silver family gets even a whiff of this, it'll spiral out of control."