Preflop
Pretty standard to defend with JTs, even though it was a very large 3,5BB open raise.
Flop
Your donk bet is a little unconventional, but I dont hate it on a low board in a multiway pot. I would however to go a bit larger. You have J high, so your goal with this bet is to get them fold. And when you give them such a great price, they are more tempted to give you action, even with
hands like A high, which you will lose to at showdown, unless you improve.
Turn
You made a flush and sized up. I like this size.
River
This is of course the interesting part, because after checking and calling on all previous streets, small blind wakes up and takes extremely aggressive action by donk shoving the river for the full size of the pot. This is kind of gross, because it reduce your hand to a
bluff catcher. He should not be doing this for value with a worse hand than yours.
He is however also not representing a lot of hands. The only logical hand, that might take this line, is A4, which he can only have 6 combos of. If he can only have A4s, because he is disciplined enough to not call preflop with A4o, then its only one combo. In he had a boat or a flush on the turn, it would be weird for him to play it this way, but of course its not impossible.
So I do think, that in the long run you can make a profitable call with a flush. Maybe he have a hand like A8 or A5, that also improved on the river, and he overplays it. Or 32 for the wheel draw, that made a straight on the end. Or maybe just some completely random bluff. A big donk bet on the river is actually quite often a bluff in my experience, especially on a card like this, that did not really change anything. Its a donk move to do that, but there is a reason, why its called donk bet right?
Results
So he did have the A4 and even the offsuit variety, which is kind of crazy, that he called preflop from the small blind. In a cash game I would certainly take a note of this, reload and look very much forward to continue to play with this kind of player, because its going to be very profitable.
Other than that the only thing, I would have done different, is on the flop. Either go for a check-raise or a bigger donk bet, since your goal is to get them to fold. This might actually have changed the outcome, since it would at least have been more difficult for him to continue with A4. He might still have done it, because he is a fish playing for 50c, but then at least you had done, what you could
