Joe is an utterly selfish piece of shit and does not know the concepts of "family loyalty" beyond what it can garner you. When Layla was an infant, Joe probably let Kurt Love and possibly Ant do things to her, rationalizing it as "not like she'll remember anyway."

He has a house, recreational vehicles, and a studio set up with his $300 a month salary. Something tells me it takes more than just a childhood oath to get several thousand from Anthony