Live short 20/40 MPNK v.s. poster and lag

[bobdibble]

Just moved from 5 to 6 handed.

CO is new to the game and posts $20.

UTG+1 nitty-rock limps, CO checks, SB laggy dude completes, I check the BB w/76d.

Flop:
3s 7s 8d

Laggy sb bets (which means any 2 cards), I raise, nitty-rock folds, poster cold calls.

Turn: Jd

Checked to me, I bet, poster and SB call.

River: 2c

SB checks, I check and plan to call a bet from the poster, but not overcall.

[TheMetetron]

Looks good.