Back on earth - The Martian AU

My name is Sean Watney, the son of Mark Watney, if you already didn't assume. Anyway! While he's stuck up on Mars for the month I'm here waiting! I live just with my dad by the way, my mum died when I was just a lil boy. So that's where she is if your wondering. 6 feet under. But I visit every day! Anyway, I'm staying with my gramma while Mark is in space. Well. I was hoping to only to be there for a year or two. But that decided to take a turn for the worse. He's now stuck on Mars. What. the. fuck.