Stuck Raising My Uncle's Lovechild

I'm forced by my mother, Karen Brown, to raise Matt Brown, my uncle Jared Brown's illegitimate son. She justifies the coercion by saying that family should always help each other.

I sacrifice everything to raise Matt for over a decade, only to discover that he despises me. It stems entirely from Mom and Uncle Jared telling him that I'm raising him with ulterior motives, that I'll be able to get back double the amount of money I spend on him in the future.