[Steven instinctively raises a hand to his chest, palm pressing over his heart. Why would his alter be angry? Is it because he isn't capable of taking the body more often, or is it because he's taking in all the anger that Steven himself keeps refusing?]

I'm... I'm sorry, mate. That's not something you should've had to deal with. I'm such a bloody numpty. I should've worked harder to find way to... to make sure this couldn't happen.