[It's an offer that Jo has extended to him before. She understands that Castiel is not much for trying to pick apart his feelings, and yet she still repeats herself, as if hoping that one day he will take her up on it.

The Thanksgiving feast would hardly be the right setting for it.]

There isn't much to say. [And he could end it there, but nonetheless, he elaborates slightly. He feels that he owes it to Jo.] This place enjoys either stripping me of my powers or rendering me unable to control them. It's... frustrating.

[It's more than that, it's harmful, but no doubt Jo can imagine what could happen if any angel's powers were out of control.]