Just because he introduced them doesn't mean he was expecting him to DATE her!
I've arranged for my young adult DDs to meet with friends of friends for things like career advice, work experience & training for sports/ hobbies, not once was that an indication of my approval for them to try n fuck my kid!
It's not that odd a thing to do. We probably all do it in smaller ways (we might not have celeb friends that our kids want to meet, but we all pull favours for things like apprenticeships, summer jobs etc)
I have friends with kids who are well into adulthood, but kids of friends are still and always kids of friends, it doesn't matter if they turn legal! I have even put them up favours e.g. one was considering my local uni for clearing, another had a summer job nearer to me than home and stayed over if he had a late shift followed by an early shift.
Zero of these arrangements or meetings were the parents setting us up!
And I really don't think there's a whole lot of difference between that, and a celeb meet n greet if the kid is into a celeb you know
It's so weird that people take the fact that the dad introduced them, as him giving it a wink and a nod