river fold or call?

[KaatzMeow]

Grunch:

Preflop: As played

Flop: CB is okay

Turn: I often fire the second barrel here in the face of no resistance from the button thinking that Button has maybe 2nd or 3 pairs to keep calling...A9s/A3s maybe.

River: I call down here but wonder what the raise is for...maybe weaker K I guess...suited with something.

Edited after reading the other posts and did not see JT...wow, maybe a leak you think? hehe