Parents bodies was identified through DNA, so yes, they dead as doornails......
And how exactly is that "not well thought out"?
I assume because making an incest game and leaving out mom and sister seems odd... i saw it a brave choice and Moonbox intentionally hamstriging himself (or just saying, "fuck you" to) the common trope of the genre.
To put words in their mouth, Moonbox wanted the focus on grandma and a mom or sister would have taken away from that.
So, dude has no idea how ironic he was when he said, "not well thought out." its quite the opposite. Like all irony, it needs a certain point of view. But I'm just some dude making shit up over here and jumping to conclusions.
Also, y'all are missing something huge: this shit aint real... the parents could show up at anytime. Thomas could wake up in the shower. We all know how well that tactic went for "Dallas."
Also also, Gravity2. Why am I the ONLY one who ever mentions it... its like y'all are choosing to be willfully ignorant. its right there, Gravity2: the answer to every plot hole and dangling-upsidedown-earring.