This is why I can get away with dating crazy people ..... I have no dick to stick in them so their crazy can't infect my via pee pee.
Another thought: The whole "religious nut" seems to point towards Theresa but the problem with that is her idiot son. The dad says he only cared about three people the MC and the two "gold-digging whores". He "cares" about you despite the fact that he calls you a failure. So why is Tommy a non-factor in the will. If he cared about Theresa he would have known about Tommy. So, religous nut and former "girlfriend of the dad, she most likely was just a fling to him. Long forgotten and not the third person in the will.
Having kids doesn't mean you care for them, there are enough shitty parents to back that up, he barely gave 2 shits about the MC and he lived with him.
Considering the MC worked hard, looks good and by extension makes his dad look good by those solid genetics ..... dog boy it a stalking potential rapist that no one likes.
If he is the MC's brother then it's almost a dead cert the dad wouldn't acknowledge a kid like that.