SB: $646.35 (107.7 bb)
BB: $607.10 (101.2 bb)
Hero (UTG): $600 (100 bb)
MP: $613.65 (102.3 bb)
CO: $600 (100 bb)
BTN: $537.90 (89.6 bb)

Preflop: Hero is UTG with As Ac
Hero raises to $18, MP calls $18, 2 folds, SB calls $15, BB folds

MP and SB are both regs, although SB is a slightly more unknown and newish reg.

Flop: ($60) 2s 3s Qc (3 players)
SB checks, Hero checks, MP bets $40, SB raises to $156, Hero calls $156, MP folds

I chose to check/call AA in this spot given that I have the As, I block AQ which is the most likely hand to call down 3 streets, I want to balance the times I have QJs/QTs, and I have a note on MP that he is very stabby when checked to- both on the flop and turn. SB checkraises to a pretty huge sizing. This was a full ring table that was playing 6handed at the time so I'm pretty sure he'd squeeze QQ preflop. I would guess his range is something like [22,33,AQ,KJss,KTss,KQss, maybe 45ss].

Turn: ($412) 5s (2 players)
SB checks, Hero checks

I don't see a reason to bet here.

River: ($412) 2d (2 players)
SB bets $472.35 and is all-in, Hero folds

I think I can still show up with QQ on this river but likely never play a flush this way. His river jam is basically pot but a slight overbet. Although I feel I don't have a ton of better hands to call in this spot, I can only see myself ahead of an unlikely AQ turning into a bluff which I block as well so I fold since I think his bluffs with this line are going to be quite infrequent.

Results: $412 pot ($3 rake)
Final Board: 2s 3s Qc 5s 2d
SB mucked and won $409 ($235 net)
Hero mucked As Ac and lost (-$174 net)