Stacking off with an overpair against an unknown? 25NL

[EDonk]

This is a literal unknown, as in first hand that he has played at the table. I know preflop blows, normally I 3-bet here so I'd like to focus the discussion on the flop play.

Full Tilt Poker - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $17.50
<font color="black">Hero (BB): $63.65</font>
UTG: $13.65
CO: $24.30
BTN: $21.65

<font color="black">Preflop:</font> Hero is dealt J[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/spade.gif[/img] (5 Players)
2 folds, <font color="red">BTN raises to $0.85</font>, SB folds, Hero calls $0.60

<font color="black">Flop:</font> ($1.80) 4[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $1.80</font>, <font color="red">Hero raises to $5.75</font>, <font color="red">BTN raises all-in to $20.80</font>, Hero calls $15.05

<font color="black">Turn:</font> ($43.40) 2[img]/images/graemlins/spade.gif[/img] (2 Players - 1 All-In)

<font color="black">River:</font> ($43.40) 5[img]/images/graemlins/spade.gif[/img] (2 Players - 1 All-In)

Pot Size: $43.40 ($2.15 Rake)