0.5/1 Sh 99

Full Tilt, $0.50/$1 Limit Hold'em Cash, 6 Players
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Preflop: Hero is SB with 9 9
UTG folds, MP calls, CO calls, BTN raises, Hero 3-bets, BB calls, MP calls, CO calls, BTN calls

Flop: (15 SB) 4 6 2 (5 players)
Hero bets, BB calls, MP folds, CO calls, BTN calls

Turn: (9.5 BB) 7 (4 players)
Hero bets, BB calls, CO calls, BTN calls

River: (13.5 BB) Q (4 players)
Hero checks, BB checks, CO checks, BTN bets, Hero calls, BB folds, CO raises and is all-in, BTN folds, Hero calls

Results:

Hi,

Stats (VP/PF/3B/FST/ DBF/AF/WTSD/W$SD [handcount])

MP3,CO,BU: complete unknown
BB: 29/16/3,6/50/2,6/38/67 [96]- seems to be a bit weird, reads:

- capped 99 in vs a nit SB on the BU
- after this pre cap he raised the flop with 99 on a Kh low low dry board vs the nits donk (a tad overplayed IMO)
- open limps 96s MP
- raised with OESD
- donks top pair

looking at his stats he looks like some TAG/weaktight player, but his play resembles rather to a loose aggressive donkey, but he is definitely not loose and looks more straightforward. His overall coldcalling range preflop is 16%, tho the sample size is small .

I think until the river its std. On the river I thought I didnt have a value bet, and I definitely didnt want to get raised so my plan was to x/c or x/f depending on action. If BB had bet, I may have even decided x/f, cause I dont know what else could he have had there than then a flush or a Qx. I dont expect him to bluff in this position and I think his value range had me completely crushed.
CO could have had everything really, the question was BU but I think I had the odds to call then. Even with CO x/r-ing in the end I had to call.

Estimated ranges of the opponents on the river that they dont fold (before any action):

Board: 2♦6♣4♣ 7♠ Q♣
       Equity   Win  Tie
CO          9.72%   9.58%     0.14% { 77-22, A9s-A2s, KJs-K2s, Q3s+, J5s+, T5s+, 96s+, 86s+, 76s, AJo-A2o, KJo-K2o, Q5o+, J7o+, T8o+, 98o }
BU         44.52%  42.11%     2.42% { 55, AQs, A9s, A7s-A6s, KQs, K9s, Q9s+, AcJc, KcJc, AcTc, KcTc, JcTc, Ac8c, Ac5c, AQo, KQo, QTo+ }
SB          5.13%   5.13%     0.00% { 9h9c }
BB         40.62%  38.27%     2.35% { 55, 33, AQs, KQs, QTs+, AcJc, KcJc, AcTc, KcTc, JcTc, AQo }

My questions are:

- is my plan on the river OK ?
- is it OK to call 2bets from CO or BU ?