@JP  
And you got your wish in form of The Big-Mac Question in season 9 :0

Loved seeing Spike sitting next to Luna like that.

Awkward sibling hug?

A moment that I waited for, for a very long time.

@Mooncrush  

 
Spike also turns to look at them and smile at the very end when they make up. :)

Spike is so comfortable with Tia and Lulu, he just rushes up without saying a word, places a gift, and runs off, no big deal :)

@Celestia’s Servant  
Not to mention how with the other ponies, Celestia and Luna avoided letting them see them bicker over who was responsible with forgetting to bring a wedding gift from them to Cranky and Matilda. Then the bit with them still mad with each other and deciding to each bring a gift next time in case the other forgets, and finally that part with where as they listen to Mayor Mare’s speech, the Royal Sisters realize they should not be mad with each other over something so trivial and make amends, earning a happy smile from Spike as well.
 
True sibling rivalry and family love there with Celestia and Luna.

I loved this scene. The princesses actually acting as sisters was brilliant.

it like this entire episode was just that small but significant parts to this series that without them the series wouldn’t be nearly so fully and great. Especially with little shout outs even to its own series that and the water serpent was a total shout out to the first season that started us all on this amazing journey of amazing funny and creative episodes.

I loved this scene. It’s so small, but it’s such huge characterization for the both of them.
 
-Lumino

Probably the best moment between the royal sisters.

Will be fun to see if they keep that promise, ie. if there’s future continuity. We need that third canon wedding.
 
Spike’s also happy to see them holding their hooves.

Yay~

the realest scene in the episode

lovely sister moment.