The faith of Lucy Romalotti?

How do expect Billy and Victoria to forget a baby they have grown to love as their own? They have bonded with her, and you can't just turn that off, and forget about her. I think that Daniel should live up to his promise to Billy and Victoria to let them have her. And Daniel needs to tell his mother to take a flying leap. She wasn't there for him when he was growing up, what makes her think she can raise Lucy? Do you ever see her with Summer? Every time you see Summer, she is with Nick.