So.. villain was just moved to the tbl an hour ago and has been fairly quiet/solid other than 3betting my btn open to 2.5x from sb and cbetting small on 752r and me folding. He's younger and could very well be an online guy but I'm not sure. I've been very active opening in lp since he's been at the tbl and last orbit it folded to my sb and I raised and he folded.
It's 400/800 75a.. hour long levels.. and about 5mins left in this level.. 2hrs to go until we break for day 2
I have ~50k
Villain has ~42k
Folds to me in sb again, I have K

7 and I raise to 2k (same size as last orbit) this time he flats and the flop comes
7

8

9

(4675)
I check/call 2100 pretty quickly
7

8

9

K

(8875)
I check and he bets 5700 after thinking for a bit... I decide to raise/call not totally loving it but thinking he can get in worse bvb considering my image in his eyes and how wet the board is.. so I raise to 13.5k and he jams. He didn't take too long before jamming
Any thoughts on the hand are appreciated. Mostly curious about my decision to raise/call turn though.