I live with my Mum, Step-Dad and 10 year old sister. For the past few weeks, my step-dad's son (18, like me) has been living with us after getting kicked out by his mother. He's been (frankly) completely out of it for the last couple of years - he only got 2 GCSEs, stopped attending college just a couple of weeks in, and since then has held odd part-time jobs on and off; sometimes going months at a time without working at all!!
He wants to join the army, and has been trying to get in with a few issues, but as I understand it, he's still scheduled to be going in for a sort of "taster weekend" in August. But none of that is set in stone, and for now, he doesn't have a job at all, and spends all day playing video games or watching TV (not waking up until 12 in the afternoon, might I add!). My Step-Dad finally blew his top this morning, and told him he wasn't putting in any effort, was here for nothing, etc. He doesn't even do any housework either.
I do get on well with my step-brother (he's not a horrible kid unless he's having an argument with someone), but I really can't stand to see what's he doing to my Step-Dad and especially my Mother, whose said she's so angry she feels sick. I can see it's really stressing her out.
I guess the reason I'm posting this is to ask if any of you have had similar experiences and how they turned out. Do you think my parents are being too harsh on him? Also, because of how annoyed I am with him, I was seriously considering not hanging out with him until he does something and stops causing my parents so much pain. Would this be unreasonable considering that it must seem like I'm the last person in the world who cares about him? (No friends, no girlfriend, the rest of his family angry with him)?
PS:
Before any of you ask what I'm doing with my life at the same age - I finished college in June and am going to university in September. In the meantime, I'm working part time as a kitchen porter and give my parents 25% of my wages.