Lady Shay was bored and she wanted to have a little fun. She felt that she had to have it even though she was alone in the house. She was in the mood to crush and destroy something and she did not want to ignore that. The mistress resorted to taking toys and crushing them for fun and it was better than she had hoped it was going to be.
Lady Shay needed to crush her son's toys because she felt that he needed to outgrow them and that he needed to develop better discipline. So she crushed them and she made sure that it was all interesting and fun. It was and she forgot for a moment what she was doing and why. But she remembered and she made her son clean up and forget about the toys as he was too big to play with them.