Spike is jealous of Owlicious. What if Spike didn't run away to a dragon's cave? What if he ran away to just the opposite? Rarity accepts Spike for who he is, so when he arrived at Carousel Boutique, Spike told her everything. Rarity felt bad for him, and Pinkie Promised not to tell Twilight where Spike is. But when Twilight goes hysterical, it is hard for Rarity to not tell her. She also didn't want to disappoint Spike.