Live 1/2NL - river brings low straight

[TheDudeAbides]

Pretty loose-aggressive game. I have 89o on the big blind and with two limpers I check. Flop comes Q J 7 rainbow. Checked around. Turn pairs the 7 and it's checked around again. River brings the 10 and the sb bets out a pot-sized bet. What's my play here?
Note - sb is a solid player that is capable of folding, and I've rarely seen him bluff and he never slowplays.