SB has:
3bet from sb 14, vs BTN 13 (depolarized)
3betpot cbet: 44
fold to float in 3bet pot: 60

Good enough reason to bet, which was my plan originally

On one hand it's true that we missed and that the board is getting super scary, on the other tho i feel like my range still contains all the flushdraws, all the Q and a bunch of sets here and there. His range on the other hand is capped.
Working a bit on crev i extimated that even if he aims at a 3rd nut flush, a big portion of his hands are folding (60% roughly).

I thought this is a good river to fire the third shove barrel, being his range capped so hard it's very unlikely that he has a strong flush, and even if he did i still have tons of boats in my range.
I extimated, even when he calls with the 3rd nut flush (TxTh) or better, he's still folding a very good amount of hands (60%).