Okay to Fold AA?

[BoxTree]

20/40 Live (Commerce), 9-handed

Hero has A[img]/images/graemlins/diamond.gif[/img]A[img]/images/graemlins/spade.gif[/img] UTG+1.

UTG Limps, Hero raises, One Caller, SB calls, BB folds.

Flop (4 players, 9 sb): 7[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/spade.gif[/img]
Check, check, Hero bets, everyone calls.

Turn (4 players, 6.5 bb): 2[img]/images/graemlins/club.gif[/img]
Check, check, Hero bets, fold, SB calls, UTG calls.

River (3 players, 9.5 bb): 5[img]/images/graemlins/diamond.gif[/img]
SB bets, UTG calls, Hero...?

I'm getting 11.5:1 here. Can I win often enough for a call to be correct?

The SB epitomizes mediocrity. He could be betting any pair here hoping that UTG has nothing and I have AK. The overcaller is pathetically loose preflop but pretty decent postflop; I have a very, very, hard time believing that he's overcalling with just one pair. But then again....

"Don't make good folds in big pots," probably applies here.

"Call, you'll sleep better," doesn't seem right since I'll get to see both hands no matter what.

"Call for one bet on the river, you candy-ass," also seems right.

Okay, so who hates my call? Who hates my fold?