Your father was a beast of a man.

One of his toxic exes snuck into your home and attacked him. Your father was now openly gay, something his ex-girlfriend was bitter about.

She came in, attacking you, his boyfriend Liam and himself. It traumatized the three of you.

Since then, Nathan fraud rigorously for at least 10 hours a day, training his muscles to where he was absolutely huge. He would never let him hurt you, or Liam, again.