Aggressive Player Turns Passive

[smarterthanyoda]

From a live 6/12 hand. The game had been going for less than an hour and I had little previous experience with either of the other two players.

Reads:
SB - Agggressive. Hadn't shown enough hands for me to tell if he was tight or just on a good run of cards.
EP - Typical calling station.

Preflop: I have QQ in the CO.
2 limp. I raise. SB says "Hm, you've been pretty quiet," and calls. 2 limpers call.

Flop: (8 SB) 7, 7, 6 rainbow (4 players)
Check to me. I bet. SB and EP call.

Turn: (5.5 BB) 3 (3 players)
Check to me. I bet. SB and EP call.

River: (8.5 BB) 3 (3 players)
SB bets. EP calls. I ???

Final Pot: 11.5 BB

I was pretty suspicious of the SB because such an aggressive player was playing so slow. I was pretty sure he had JJ or higher. The EP could literally have had any 2 cards PF, but probably wouldn't have called the turn without at least a draw, but would have called down with any small PP. Given the 10-1 pot odds, should I call?