If she stays with Alan, which I think she would, he is totally her "type" he's selfish as well, then she'd never come back for him, if things fall apart I think she'd play on her brother's feelings and try use them for her own means--meaning, she'd either want money or she'd try to drag him over the coals to get Cody back..either way, no one in their right mind would let her be a mother to him.