I guess a key question, is whether he could go somewhere for the day without an adult.
If not, supervision is required. You assumed it would be the parent of the friend and clearly they wouldn’t charge you. If it was the Carer, he was under her care if there was no other adult. As someone who does this for a living, the6 do charge people. As you say, you’re not a friend.
It strikes me as odd that the host’s parents thought they could expect the hired Carer to take responsibility for a child they weren’t expecting to pay for. And if they weren’t expecting the Carer to do the caring, who exactly was to be in charge of him and there to support him if at any point he needed it? This doesn’t have to be complex care…it could be literally being an adult presence for reassurance. However, if a teen needs that reassuring adult presence and no-one is providing it for free, then the lesson supplying it can expect to be paid.
I think this can be a blurred line with young adults who have some needs, but they aren’t especially high level. It can feel like you’re paying for something you’re not getting or don’t need…..except, if they can’t manage full independence then you do have to pay if you aren’t the adult presence yourself. It’s hard.
And yes, this isn’t like working in a Care Hkme where you’re paid a day rate or hour rate regardless of the number of people there or take you do. This is someone being hired to provide personal care and you pay more for looking after more people. It’s like a childminder being paid more for having 2 children not just 1. If you take 2 siblings, you might get a discount for sending 2 but you’d pay for 2.
No-one is faultless here. The Carer should have checked, but OP recognises she should have realised Carers would be involved snd clearly the Host didn’t spell it all out clearly to the Carer or Op.
I’d say it’s very difficult to say categorically that no help or support was needed nor provided. Given he was there and part of another pair getting support (purely by the cArer’s presence, never mind anything much more active than that) I’d say he was supported.
It’s the kind of thing when you can’t go and and opt out of the qualified care that’s there. For example, you can’t go to a swimming pool and say you don’t require the lifeguarding supplied and so won’t pay for that element but still want to go. This whole trip could t have happened without the Carers….bu it did. Yes, the Op wasn’t fully aware how it was being organised and supervised. That was a problem and mostly on the hosts part.