A few questions about a recent hand

[flyingmoose]

theshakes is at seat 0 with $101.
azret is at seat 1 with $157.25.
flying_moose is at seat 2 with $94.50.
jhart17 is at seat 3 with $100.
-best- is at seat 4 with $61.50.
Billy Cash is at seat 5 with $119.
Slammer54 is at seat 6 with $48.50.
get-it-on is at seat 8 with $32.
IM_A_JOKE is at seat 9 with $36.
The button is at seat 2.

-best- posts the small blind of $.50.
Billy Cash posts the big blind of $1.

theshakes: -- --
azret: -- --
flying_moose: 8d 7d
-best-: -- --
Billy Cash: -- --
Slammer54: -- --
get-it-on: -- --
IM_A_JOKE: -- --

Pre-flop:

Slammer54 calls. get-it-on calls. IM_A_JOKE folds.
theshakes calls. azret folds. flying_moose calls.
-best- calls. Billy Cash checks.

Flop (board: 4s Ad Td):

-best- checks. Billy Cash checks. Slammer54 checks.
get-it-on checks. theshakes checks. flying_moose
bets $6. -best- folds. Billy Cash folds.
Slammer54 calls. get-it-on folds. theshakes folds.


Turn (board: 4s Ad Td 7s):

Slammer54 checks. flying_moose checks.

River (board: 4s Ad Td 7s 4d):

Slammer54 bets $17. flying_moose calls.



Showdown:

Slammer54 shows 4c Jd.
Slammer54 has 4c Jd 4s Ad 4d: three fours.
flying_moose shows 8d 7d.
flying_moose has 8d 7d Ad Td 4d: flush, ace high.


Hand #3898536-10450 Summary:

$2.50 is raked from a pot of $52.
flying_moose wins $49.50 with flush, ace high.

Was taking the free card on the turn the correct play, or should I have followed through with the semi-bluff here?

Also, the way the villain played this hand, I thought both the boat and higher flush were possible, which is why I opted to just call at the end. Was there any evidence toward him being weaker than me that I missed? On the other side of that coin, was there enough evidence that he was stronger than me that this call is -EV in the long run?

[PoBoy321]

I don't like the flop bet. You're in last position, you can get a free card, so take it. Otherwise, well played.