Dumbest Idea I've Ever Heard Of

My dad and his girlfriend are gone for the week and I have to stay here every night to watch my little sister. At the forefront it doesn't seem that bad because she's gone majority of the day at camp and I just have to be here for her to go to sleep. With normal children I could leave after she falls asleep but supposedly she tends to wake up randomly in the night. But this part right here is what really really irks my soul. I have to stay here while my grandfather, 19-year-old cousin, and 27-year-old brother stay here. Honestly I find it to be one of the most idiotic ideas I've ever heard of. And my dad claims he has good reasons as to why all three of them aren't suitable for the job. Regarding my cousin, he says he doesn't want to put that responsibility on her. But my little sister if effing 11 years old; it's not like the girl's a baby, my cousin doesn't have to do really anything. Plus I don't like that my dad isn't respecting her as an adult. Now on to my grandpa. See I understand that my grandpa lives like he's my age now (coming home til 3 am and what not), but I really don't think if they told him that he had to watch his granddaughter for a week that he would say "can't do it, I got a few parties coming up". And if I said that to my dad I'm pretty sure he'd go back to this bs that my little sister doesn't like staying in the house with my grandfather alone. Now ish like this would've never been able to fly if me or my other sister would've said something like this to either of my parents. My dad and his girlfriend just spoil my little sister and let her get away with crap that she shouldn't. She can only get away with what they allow her to get away with. Last but not least, their problem with my brother. In a nutshell, they don't trust him and treat him like a child. They treat him like a child because they can't trust him. But he doesn't know how to earn trust since they don't give him any responsibility for him to act older than a child. Plus he stays here rent free...make his ass do something man!! So utimately my problem is that I'm being inconvenienced because my dad and his girlfriend don't trust anybody just based on them not giving anyone a chance. Well that's all for tonight. I wouldn't doubt if I have a rant per day this week. You've been warned.

...it's been real luvs --->DUECES