Opp may be tilting

I suspect opp is tilting but is generally standard player. capable of bluffing. River push was instant. My problem here is this is never tpwk and never any weak made hand. So its either nuts or air. I suspect he raises the nuts and air sometimes on the flop, more likely the nuts. I do think he shoves good draws on the flop, but probably not gutters. So to call or not to call? Alternate lines welcome.

PokerStars Game #11764470733: Hold'em No Limit ($1/$2) - 2007/08/29 - 20:52:41 (ET)
Table 'Caph' 2-max Seat #2 is the button
Seat 1: heybude ($421.50 in chips)
Seat 2: legspin ($237.50 in chips)
legspin: posts small blind $1
heybude: posts big blind $2
*** HOLE CARDS ***
Dealt to heybude [Jd Jh]
legspin: raises $4 to $6
heybude: raises $14 to $20
legspin: calls $14
*** FLOP *** [9d Kd 6c]
heybude: bets $28
legspin: calls $28
*** TURN *** [9d Kd 6c] [3s]
heybude: checks
legspin: bets $50
heybude: calls $50
*** RIVER *** [9d Kd 6c 3s] [2c]
heybude: checks
legspin: bets $139.50 and is all-in
heybude: calls $139.50