Tobias would be very pissed if he knew what his sister was up too but for the moment he was occupied with Kat. As they moved down to his room he'd open the door to let her in before he'd follow her directions and grab a chair turning to sit in it with her ipod playing very curious to see what the girl had in mind for him. He hadn't thought to lock the door, for whatever reason assuming Natsuye was just going to stay in her room all night. As she started getting moving he had the sudden realization it was going to be a lap dance and to give her a little added incentive or motivation he elected to pull down his pants and release his dick so that she could have the freedom to go even further with her plans or intentions.