I'm certain you are. [But the fact still stands that he currently is having issues, and Rarity simply cannot leave somepony in that condition, especially with Nightmares around.]

I'm coming anyway, just to be certain everything is alright. [She magics her saddlebags on as she speaks, placing a few items - extra potions, treats for Tony's bat, sample clothing she obtained from the Moogles that might be around his size - in the bags and sparing a treat for the Pricklemane watching her.] You just stay there with Steven - the Moogle - and drink your potion and I'll be right over.