Thanks everyone,
This helped me a great deal.

What I ended up doing was to STFU about H's attendance at the before party - he didn't do it for me, I take old-timer's point!

But, I did thank him for picking D16 up from the after party at 2.30am (kids these days - where did all this partying come from at this age???).

I did the pre-after party pick-up at 11pm, but H did the hard yards in the early morning, so earned some praise from me, I figure.