Could I just check back river?

Raise more on the flop. Raise the turn. Bet more on river.

As played with no reads or info, you have to call here w/ the azz end of a straight flush.

Yep, I would actually raise the turn: He does like his hand, he does like his draw - whatever draw he has. I would raise turn.

OMG! On the river, you only have 2nd nuts! I am calling and hoping there's some kind of bad beat jackpot out there. I'm not folding.

Interestingly though: On this kind of board, you could even get the second nuts to fold.
Good to remember. 😉

Agree with others, flop raise bigger and raise turn ... you would not end up in a weird river spot if you were building pot properly.
Be greedy with nutted hands.

I would never check river with straight flush lol, but you can do whatever you want.

Raising more on the flop is objectively wrong. We are trying to get called. When villains donk small they are invariably weak and I'd rather raise large with any two to blow them off the hand. With the nuts we want to raise small to get a call here.

Raise turn is probably correct though.

But the question was can we check back the river. And I think the answer is actually yes.

Villain's hand screams queen of hearts even before the river. What hand donks small on the flop, calls a raise then donks again on this turn? For everyone who think checking back the river is wrong or even sillier that we should be bet-calling the river jam, what does villain's range look like as played?? I'm seriously struggling to come up with hands that don't include the queen of hearts. KhQx is a potential but this hand is not as likely to donk bet small on the flop.

Moreover what hands are we trying to get called by with a river bet? King of hearts, yes okay maybe, but the next biggest heart available that we beat is the six of hearts! Sure he can have some hands with the king of hearts in it. But how many hands will he have with just a weaker heart, the 2 thru 6? Close to zero imo. So next is a random queen with no heart in hand. Does the action so far read like a hand with a random queen. Infrequently yes. Will a queen call a river bet? Maybe some times.

So this looks like a situation where his range is heavy queen of hearts. Very very heavy. And not much anything else honestly. I legit think villain is going to have the queen of hearts >50% of the time here on the river and I think a bet is bad. And villain is never going to be bluffing here because it's also super easy for me to have the queen of hearts. It would be suicidal.

I think if I wasn't also holding the ace of hearts a bet on the river makes sense but with A7hh exactly I actually think checking back the river is the better play. Anyone wanna run this on a sim and see if I'm right or at least close?

Raise flop, raise turn, check back river.

Can't think of a good reason to flat turn with so many combos to get value from. Qx, two pair, sets, Kh, 8h. Calling sort of implies you expect them to punt the river, and want to keep their range full of trash. There aren't any true bluffing candidates when you hold the Ah. They always have a made hand on the turn.

A sane player doesn't call anything worse than the Kh on the river. From their perspective, how are you ever bluffing. Sometimes Kh finds a fold. Frequently even. You could be bluffed, you could be value-owned by the Qh. Betting does not make sense.

Hell yeah! We got someone to agree checking back the straight flush is the right play! That's gotta be the right move. You always have to think about things and not just default to some lack of logic mentality of "i have straight flush". The ultimate value of the hand is very different. Checking back the straight flush is the right move. Someone run a sim and tell me how close it is.

And yeah the biggest mistake was not raising the turn to 58 or so. He was eager to put in money.

Given preflop/flop/turn action you clearly playing against fish and when you play against fish your value hands become more profitable then normal. Fish overvalue hands/ get attached to hands/ etc etc. I know you got this hand to prove that your right, but you are being too results oriented.
Raise flop larger (~30$), if he still donks OTT put him all-in or raise and jam any River.