"Her flaky, childish lazy brother who has a knack for keeping dodgy company"
You literally know nothing about these people yet you write stuff like this about them. What on earth is your problem?
We know what OP has told us all @INACGMOOH & the PP you quoted made a decent summary. Here are OP's own words:
I do like my brother. But again this thread has made me think as a number of his friends are extremely strange and not people I would have around my children - smoke weed etc.
also I like my brother but he is a huge man child and it is one of those situations where, for example, he has been to my house 50 times this year and I’ve been to his 0. So perhaps this is just an extension of me feeling a little used?
Brother offers to bring consoles is most likely to be his way of saying they don't want to be any trouble. Yes, it's clumsy and misjudged but I doubt it comes from the feckless standpoint you're promoting here.
Disagree. It was a disingenuous ploy.
He offered to bring the console round "to help entertain the kids" knowing damn well that the games are totally useless to the kids as they are too young for them.
If he doesn't want to be any trouble he could act like a proper uncle & play games DC can actually enjoy with him. You know - the boring, repetitive ones we all grit our teeth & pretend to be delighted by.
As for dodgy company. WTAF? There is absolutely zero evidence that this friend is "dodgy". What about the fact that he's likely to be lovely? Your stranger danger is off the chart.
See above.
Manchild with dodgy weed-toking mates.
That's not stranger danger, that's "DB's got form for hanging out with folk who like getting off their tits, maybe this chap I've never met is like that too."
This thread makes me sad. The milk of human kindness is well and truly sour.
It's ok to be sad.
You're just sad about the wrong thing.
It;s sad that in an attempt at brinkmanship, DB has threatened to leave his mate home alone if OP won't give him what he wants.
Leaving YOUR OWN MATE behind because you are too selfish & lazy to host them yourself, but expect your sister to do it, is much sadder than being irritated that your manchild DB is manipulating you to perform womanwork for him.