I think it's a beautiful shot.
And as you say, you can't recognise them even if you'd know them. Perhaps they'd have liked it if you had approached them to say you take pictures of what you think of are beautiful moments. They'd probably loved the picture as well.
Really nice shot, thumbs up. :)
Thanks! Yeah I didn't really think about that until much later, but you are right, if it was me I would have wanted a copy! :)