Flop trip aces and not liking it

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Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $65.35
BB: $61.50
UTG: $50.75
MP: $126.20
hero (CO): $52.35
BTN: $49.75

Reads: <font color="blue">mp is 80/11/3 and is quite the donk
bb is 16/11/2 over 170 odd hands
I was 17/13 and had none done much other then steal the blinds a few times.</font>

Preflop: hero is dealt T A (6 Players)
UTG folds, MP calls $0.50, <font color="red">hero raises to $2.50</font>, 2 folds, BB calls $2.00, MP calls $2.00

Flop: ($7.75) A 7 A[img]/images/graemlins/spade.gif[/img] (3 Players)
BB checks, <font color="red">MP bets $0.50</font>, hero calls $0.50, <font color="red">BB raises to $2.50</font>, MP calls $2.00, hero calls $2.00

Turn: ($15.25) A 7 A[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] (3 Players)
<font color="red">BB bets $10.00</font>, MP calls $10.00, hero calls $10.00

River: ($45.25) A 7 A[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] 6 (3 Players)
<font color="red">BB bets all-in for $46.50</font>, MP folds

Pot Size: $91.75

Ok so my call on the flop was to see what the bb would do, I am happy to get it with the donk and I think it will be pretty easy over 2 streets to do it. When mp raises then I think I am likely ahead but by 3 betting him, I likely eliminate the donk and only get him to call when he has ace or boat and with his stats I think his Ax could beat me a lot as he seems the sort of guy who folds A2- A5 etc

On the turn, a bet and a call. I am fearing I am behind now so just call.

Is the river an easy decision either way?
Comments on my thoughts processes?