Saving a Bet....and Some Poor Turn Play?

[Jeffage]

30-60 on Party. I have A [img]/images/graemlins/spade.gif[/img]A [img]/images/graemlins/heart.gif[/img] on the button. Unknown MP opens for a raise and I reraise. A loose player calls out of the SB and the BB folds. MP calls and we see the flop 3-ways.

4 [img]/images/graemlins/club.gif[/img]7 [img]/images/graemlins/spade.gif[/img]10 [img]/images/graemlins/club.gif[/img]

SB bets, MP calls and I call. Turn is the 5 [img]/images/graemlins/spade.gif[/img]. SB bets, MP calls and I raise. SB now reraises, MP coldcalls and I call. Anyone let go of this here in my spot?

River is the 6 [img]/images/graemlins/club.gif[/img]. SB checks, MP now bets, I fold and SB calls. Comments?

Jeff