I think I would be bet folding this flop, checking back this turn if called, then calling river to a 65% pot bet or so... we can bet flop and fold a lot of hands that have equity against us; we have a pair possibly dead gutter and 2 backdoor flushdraws which can give us some turn barrels if we get headsup on the turn. If we bet flop SB calls others fold and SB then leads for pot on the 8x turn it is probably a fold.
As played it does look like SB has a QTxx hand to bet pot into 3. As played I may just fold turn. We have 3rd nuts with no outs to improve and are potentially dead likely needing to call off 4x the pot on the turn by the river to find out.