5nl bet sizing with side pot?

[sivadom]

Realized as soon as the flop hit that I had no idea how to size bets in these situations
Poker Stars, $0.02/$0.05 NL Hold'em Cash Game, 4 Players
LegoPoker (http://www.legopoker.com)Hand History Converter (http://www.legopoker.com/hh)

Hero (BTN): $7.15
SB: $11.22
BB: $6.97
UTG: $0.31

Pre-Flop: 9/images/graemlins/diamond.gif 9/images/graemlins/heart.gif dealt to Hero (BTN)
<font color="red">UTG raises to $0.31 and is All-In</font>, Hero calls $0.31, SB calls $0.29, BB folds

Flop: ($0.98) T/images/graemlins/spade.gif Q/images/graemlins/heart.gif T/images/graemlins/club.gif (3 Players - 1 is All-In)
SB checks, <font color="red">Hero bets ???</font>

Maybe i shouldnt even be betting at all? I'm pretty sure SB missed and will fold here at least 70% of the time, he was pretty weak (50/10/.8)

[Milky]

You could have prevented this situation altogether by 3betting pre-flop to isolate the all-in since you most likely have the best hand.

As played I'd lead out for .50 or so and just c/f if called and you don't improve on the turn.