With TPWK I would check behind on the turn to keep the pot small. What do you think he is calling a pf raise with (which btw should be 90) then c/c flop and c/r the turn? My best guess would say Ax (where x can be anything- some people even play AK like this), 67 (very unlikely) or a set.

Most of the time you are behind, so the check behind on the river is good imo.