Standard play?

Seat 1: BB ($136.91 in chips)
Seat 2: UTG ($31.97 in chips)
Seat 3: UTG+1 ($244.49 in chips)
Seat 4: CO ($15 in chips)
Seat 5: HERO ($101.25 in chips)
Seat 6: SB ($99 in chips)
SB: posts small blind $0.50
BB: posts big blind $1
----- HOLE CARDS -----
dealt to HERO
UTG: folds
UTG+1: folds
CO: folds
HERO: raises to $4
SB: folds
BB: calls $3
----- FLOP -----
BB: checks
HERO: bets $6
BB: calls $6
----- TURN ----- [9h]
BB: checks
HERO: checks
----- RIVER ----- [4d]
BB: bets $30
HERO: calls $30

Is my play OK here? BB is loose (45/21), so I thought he might have Adxd with the turn check.

You absolutely HAVE to raise this river. You have the 2nd nuts. He can have a straight (which may call a raise) or a lower flush (which will definitely call the raise) or even some weirdly played two-pair or set. You are leaving soooo much money on the table by not raising the river.

A minraise damn near puts you all-in on the river.

You have the 2nd nuts.

Roy, can I borrow your MALLIN button after I buy this man's hand from him?

If the BB really was "loose," there is absolutely no way he would NOT have bet the turn with the A[d]X[d] - shove your money in the pot for the love of GOD!

Plz bet the turn, plz raise the river.

2nd nut flush... non-paired river card, you are only losing to Ax or , Against a loose player I am raising this river all in nearly all the time..... He may well have a lower flush a large % of the time.

Stop saying he has the 2:nd nuts, is the nuts, suited is the 2:nd nuts.

But yeah, raise the river ffs! I wouldn't bet the turn though, I'd rather chase my 7-15 outs for free.

Really? Maybe I've been playing too much Omaha, but that's a BIG overbet. I dunno, I'm pretty happy with just the call, at least without more of a read.

Side note: There was a loose-aggressive (particularly when drunk) but competent player during tournament week a little while ago whose overbets gave me some problems. I more or less never overbet, but it did made me wonder if there were certain table types where you could do this profitably with some hand selection. I think that would be a topic very much worth exploring. Maybe it's just a good idea when stacks are pretty deep (as they were at this table)... (?)