Gen; Castle/Percy Jackson, 2300 words. For graycardinal: follows Closing Pandora's Box.

Gram's face contorts a little, like she's trying to smile; then some of the tension goes out of her spine, and she sinks to a seat on Alexis' desk chair. "Kiddo, how long have you known?"

( A Little Family Drama )

(x-posted to crossoverfic and at AO3)