The danger with broaching the topic he most wants to discuss is that he will accidentally awaken some ancient Dark that shouldn't be awoken. Gaia might not be aware of it at all. He had made his offer to Gaia to push down the memories that came from him, but he's not going to bring it up again. She knows the offer is there, if she chooses to cope another way D isn't that bothered by the fragments of himself she's learning to pick apart from herself. Or the possibility that there are pieces of him that will simply become part of her. Gaia's sewing skill certainly has improved, as has her knowledge of home repair.

"When you were struggling against my memories, I got a feel for your magic. Are you some kind of Dark mage, or was that a reflection of my magic?"

A safe question that will give D some further idea of what he's working with. He's very certain that was in there without his influence, but does she know that?