Can anyone justify value betting here

[Billy Baroo]

Party 10/20 6 max.

Loose, but unpredictable, player limps UTG, I raise red jacks from MP, folded to semi-tight BB who calls, UTG calls.

Flop: 4d 5s 8d

Checked to me, I bet, both call.

Turn: Td (4d 5s 8d)

Checked to me, I bet, both call

River: 8c (Td 4d 5s 8d)

Checked to me, I check