After barely saving Tommy from plunging into lava, Dream became somewhat worried for the teenager, and assigned himself the role of watching over him, making sure Tommy didn't try anything like that again. He'd always been painted as the villain, and, to be truthful, he was sometimes, but this time? No, this was genuine concern. And he was going to make sure Tommy was okay no matter what.
Tommy hated it. He felt like eyes were burning into his soul at every waking moment. After his moment of weakness in the Nether, he never had a moment alone, and sure, he would've been glad for that, he would've thanked any god there could possibly be that he was no longer alone, except the problem was with his company...the one rival he'd had for years.