When I was watching this, I thought - “finally! Rarity and Sweetie Belle FINALLY having a sweet sister moment”.
Up until this point of the show, the only interactions we’ve really seen between the sisters is Sweetie Belle destroying Rarity’s boutique in an absurd comedist way (typically after ignoring Rarity’s instructions to stay away, or by using Rarity’s stuff) followed by Rarity getting rightfully, quite annoyed. If you have sisters, it’s easy to understand both perspectives; young children are desperate for the attention and approval of their older siblings, and older siblings often deal with the consequences of their siblings messing up their stuff with no recourse. (For reference, I’m the youngest in my family, with two sisters, so I’m trying not to be biased here).
I liked how despite Rarity’s loathing of the “uncouth”, to make it up for Sweetie Belle, she’s happy to get down and dirty. It’s clear that Rarity really does love her little sister even if she hasn’t been great about showing it so far. Was Applejack holding her breath the whole time in the mud pit?
Overall, I thought it was sweet to have a nice sister bonding episode, and as a little sister myself, I gave my big sister an extra big hug goodnight after watching.