“I’m just not sure if he got a higher gpa than what he’s been saying but he did get admitted.” You admit you don’t know his grades. Bet you don’t know the rest of his app, either.
OP, rather than look for hooks, you need to face the reality that your grades are lower than a tippy top expects. I don’t think you grasp that.
You do not get accepted because your parents had issues. You do not get accepted because pressures got to you. Nor because someone else you know, low income, got in.
You dont seem to get what it does take. Or some of the basics, like fin aid. That suggests you have little idea about Harvard, in the first place. This is all mixed up.