"While I won't be there at the assembly, I would love to meet you for dinner after you get out."
I would have seen how that went over. You are a grown adult that can do what you want, but it sounded like a set-up to make you feel that you had to go. Since you did go, were you forced to talk about it? ...or did you all just never mention it again at the breaks and on the way out of there?