Logically, she knew blaming Apollo made no sense. Her son's death had come out of nowhere, no one had time to react, but illogically it made perfect sense to blame him. It was the same reason she blamed herself. The whole could have, should have, would have thing. But he was still Musagetes, and obviously her boy thought highly of him. And she'd do a lot to keep her son smiling, so she brushed the anger away.
This was his celebration, and she'd make sure it was a good one. So far, everything was going splendidly. She got a few odd looks from people who walked past them, as even with the warm sun she still wore long sleeved shirts and skirts. She cared not. It was better this then to have them point at her scars and whisper.
She smiled at her son's obvious happiness and set the food down. Hell he could have invited anyone, just as long as he kept being just as happy as he was now.