Why should I bet? Why should I not bet? (100nl)

[Orsman]

Reads: The only pot I've seen him play in was when he raised A8s utg, got one caller, checked behind on flop and raised a weak bet when he got a FD on turn.

What is the best way to play this turn? It sucks to get raised but I don't think he is raising me with hands that I have beat/split (Ax, Kx, FD). Folding here felt weak too but If I call his turn raise I have to call any no heart river, and I might even be drawing dead...

100 NL, hand converted by the iPoker Converter at Talking-Poker

saw flop | <font color="#C00000">saw showdown</font>

Button ($73.68)
SB ($101.20)
BB ($71.52)
UTG Hero ($107.80)
UTG+1 <font color="#C00000">UTG+1 ($158.85)</font>
CO ($100.00)

Preflop: Hero is UTG with A [img]/images/graemlins/club.gif[/img] J [img]/images/graemlins/club.gif[/img]
Hero raises to 4.00, UTG+1 calls 4.00, 4 folds.

Flop (9.50) 7 [img]/images/graemlins/heart.gif[/img] K [img]/images/graemlins/club.gif[/img] A [img]/images/graemlins/heart.gif[/img]
Hero bets 7.00, UTG+1 calls 7.00.

Turn (23.50) 7 [img]/images/graemlins/club.gif[/img]
Hero bets 16.00, UTG+1 raises to 52.00, 1 fold