200NL
btn has been loose aggro over small sample.

Btn $5
Hero SB KcJd $22
Btn calls

Flop ($46) Jh 3s 6h
Hero cbet $15
Btn calls

Turn ($76) Jh 3s 6h 5s
Hero bets $26
Btn raises to $60
Hero calls $34 more

River ($196) Jh 3s 6h 5s 3h
Btn bets $90
Hero KcJd ?

In game it seemed like a very strange line to raise the turn small and then keep betting on paired board and front door flush completing. Just didn't make a lot of sense to what range of hands would play like this. As I am getting used to $1/$2 I have been playing very weak tight so far, trying to see what hands these players are showing down. A lot of these bets are not making sense to me.