When to fold in this large pot?

[Borodog]

No stats on any players in the hand.

I felt like folding the turn, but used the excuse that I closed the action to call. One the river with TPTK, I convinced muself I can't fold this large pot for 1 more bet, even though there was essentially no hands left for the aggressor that I thought I could beat (I could tie an ATs in the wrong suit maybe, but that's about it).

Fold the turn? On the river is this a standard call, a peace of mind call, or burning money?

Party Poker 2/4 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is MP3 with A[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, MP1 calls, MP2 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">3 folds</font>, <font color="#CC3333">BB 3-bets</font>, MP1 calls, MP2 calls, Hero calls.

Flop: (12.50 SB) 8[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets</font>, MP1 calls, MP2 calls, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">BB 3-bets</font>, MP1 folds, MP2 calls, Hero calls.

Turn: (11.25 BB) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, MP2 calls, Hero calls.

River: (14.25 BB) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, MP2 calls, Hero calls.

Final Pot: 17.25 BB
<font color="#009B00">Main Pot: 17.25 BB, between BB, MP2 and Hero.</font>