If Tommy found out about it I think he'd be a lot less pissed having Josy around because it would be like his trump card to use against her. I get the sense he doesn't want her around in case she finds out about the stuff he does and tells their parents what he's been up to, and if he knew about her and Maya and that they want to keep it secret, he could use that as leverage to prevent Josy from telling their parents what he gets up to. But, as I said before, Tommy is dense and I don't believe he knows anything more than them being friends.
It's polygamy of 1 man with different women in separate relationships, the women don't get involved with each other. So even if Maya's family are Mormon, it still doesn't make their throuple any better in her Dad's eyes.
What videos? You mean the ones of her with the MC? Because she sure as shit isn't showing
those to her Dad.