NL50: TPTK Looking for pot control but c/r on the turn

[effang]

No reads/stats on villain, but he's short, so probably bad/average. I don't check the flop often, but HU, against an unknown, i may check this flop to avoid getting blown out.

Double suited on the turn, I bet to protect against the 18 flush cards and any Q,K,9, that will scare me.

What's my action on the turn, and why?

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 8 Players - (LegoPoker Hand History Converter)

SB: $29.95
BB: $48.50
UTG: $14.50
<u>UTG+1: $31.15</u>
MP1: $4.00
<u>Hero (MP2): $69.10</u>
CO: $16.75
BTN: $68.80

Preflop: Hero is dealt K[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/heart.gif[/img] (8 Players)
UTG folds, UTG+1 calls $0.50, MP1 folds, <font color="red">Hero raises to $2.00</font>, 4 folds, UTG+1 calls $1.50

Flop: ($4.75) T[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] (2 Players)
UTG+1 checks, Hero checks

Turn: ($4.75) 5[img]/images/graemlins/club.gif[/img] (2 Players)
UTG+1 checks, <font color="red">Hero bets $4.00</font>, <font color="red">UTG+1 raises to $11.50</font>, Hero ...