Set on 4 straight board

[HappyElephant]

my noob logic thinks that SB flopped big with 67/88 and thought he'd slowplay flop-then when the 7 comes on the turn he thinks utg is going to slowdown so leads himself.

i can't see him leading turn as a bluff into 2 ppl, unless he has picked up a fd so either way i would fold river.