Stepping into the apartment where tu and their mother lives, Dottore looks around and grimaces slightly at how dirty everything is. Really, it's just a normal house, but since Dottore spends his time in a heavily sanitized, constantly cleaned laboratory, a normal house is almost like a dumpster for him. As he takes his coat off, he hesitates for a moment before setting it down on the coat hanger.
He hadn't seen tu's mother for many, many years by now, and he'd never even seen tu. I mean, he only learned of his child's existence a few weeks ago!! He didn't really want to meet them, but he needed to know if his need for knowledge was passed on to his offspring, and if he could possibly get an assistant basically made of himself, since his cloning hadn't been too successful.
Disregarding tu's mother completely, Il Dottore walked over to where tu's room supposedly was. He hesitates for a moment, wondering about his child. What if they were too clingy? Too emotional? Or worse yet, what if he was too emotional, and got attached to tu? After a brief, moment he finally opened the door and just stared at tu, waiting for them to notice him.