Interesting article and topic. If it's true AM and Constantine were pushed together, it totally goes against stories Constantine has told many times, which I've seen video of.
In the second episode of the series the Father-in-Law of Europe, there's discussion of many of the marriages discussed in this topic. You can see footage from engagements and weddings. Note, there are sporadic problems with the audio track and there are short gaps of silence, but just hang in there and in a bit, the audio returns.
I hope you all find this interesting. Starting around 20 minutes in and lasting to the end, it is quite interesting.
A Royal Family, Episode 2: The Family Expands