Donk of death the river?

[pohuist]

Is he a good player? Your raise out of SB is likely 10-10+ or AQ+. You are not betting the turn w/JJ or AK (unless its specifically AsKs, and even then...). So, if he is a thinking player, he should figure that the only hand that bets the turn and checks the river that his 2 pair beats is KK. The probability of you having exactly KK is way below 50%. He checks behind unless he hit a set. Bet and get a crying call.