Granade tweeted: "You all do know that this man has an auto immune disease... right? Like you do understand what you are doing when you do this right? Just want to make sure."
MTV VMA Awards 2018: Nicki Minaj, Amber Rose, Rita Ora & other Hollywood CELEBS bold RED CARPET pics!
Grande and Davidson's engagement was confirmed in June amid a whirlwind, highly publicised romance. The two continue to share affectionate message on social media, as well as photographs and videos of each other.