AIBU to not want friends' Au Pair to join weekend away

[1mumlife]

Long weekend away (2 nights) planned for a few weeks - friends have only just asked if their au pair can come too. What's the etiquette here?
We are both working parents and were really looking forward to chilling out on a simple break away with our family and theirs. Honestly not that keen to have someone else around (relatively new au pair for them so they dont even know her well to be that comfortable with her)
AIBU or are they? I dont want to upset my friends if the thing that people would usually do is just put up with it (even though we would not really enjoy the whole experience as much plus its quite an expensive break so also feel a bit like we are subbing them (5 in total v. our 3)). Help...

Update OP?

We took them to the theatre, to London, beach etc. We did everything possible to make them welcome, but at no point did we cross the boundary of making them 'family'. They are not. They are there to learn the language and to enjoy the experience, but at 80.00 a week, plus her lovely room with ensuite, and all her meals she was definitely paid!!! And as such is staff, not family

But au pair is literally not staff - au pair means equal or at par and to be part of the family and not staff

en.m.wikipedia.org/wiki/Au_pair

Or, as AuPair World says

^Definition of an au pair
(Also to be found with keywords Au pair and Definition au pair)
An au pair is an unmarried young adult aged 18 to 30 years, who has no children and travels to a foreign country for a defined period of time to live with a host family. The au pair is considered as a full member of the family during the entire stay. As such, he or she helps the family with childcare and can be asked to assume some light household tasks. In return, the host family provides free board and lodging, as well as pocket money. However, the au pair is neither a housekeeper, nor a nanny^

I've been an au pair, and my generous, friendly and welcoming family also involved me in outings, mini holidays, took me sightseeing and introduced me to their friends. I loved all of it - because learning the language, and learning more about the culture and country was the main reason I had decided to be an au pair. I was 18, away from all family and friends in a foreign country, and did not always find that easy at all! I bet many of you here would feel the same, even if you are much older now. Most of my friends feel awkward just going to the cinema or out for a meal by themselves, and things could get pretty lonely on my own after being used to seeing my friends at school and hanging out every day. My family was kind and supportive, and I had an amazing experience. I am very grateful.

I would have no problem with au pair coming along. I'm sure there will be plenty of opportunity to talk if you have something very private to discuss. Otherwise, it is hardly any trouble to me to be warm and welcoming to a stranger, and I'm a classic introvert.

I would maybe sort something out financially if you are worried.

Having an au pair is (in theory) a bit like a student exchange - they are helping around the house, yes, but I would treat her - or him - as a guest and it's definitely not unusual to invite them to spend time with the family at the weekend.

The only thing that would bother me in your scenario is the payment, it should definitely be divided by 8 and split 5:3 in proportion to the number of people from each family

Au pairs are NOT staff fgs!

I hate tedious threads where OP disappears

OP gone?