I love the way you drew the poses. We can tell Zecora is a kind person at heart, and mean no harm whatsoever. She's so relaxed with having tea with Twilight, it's very warm and inciting. Of course. we can also tell twilight's uncomfortable, with so much tension on her shoulders and her eyes.
I actually can relate to this kind of situation. When I go over to my uncle's and aunt's. They are pleased to have me over, but I end up feeling out of place and uncomfortable. But they're still so nice to me and kinda spoil me. Now I feel bad for not making myself at home when I go over.
Really loving your humanized art, as always, but the arms really strike me as... Wrong, in this picture, Twilight's are fine, but Zecora's seem really short. I'm not entirely sure how to fix that, maybe set the elbows resting farther apart, with the forearms at a ^ angle?