NL50 vs unkown ss mit set. River completes draw and v moves

[Wi11i]

villain grad mal 2 hands
instacallt flop... deutet ihr das auf was?
hGeldhai1 ($48.64)
mikedrum ($27.50)
manyamia ($53.47)
SplitYaWig ($49.25)
G1ueggser ($57.10)

Geldhai1 posts (SB) $0.25
mikedrum posts (BB) $0.50

Dealt to G1ueggser :6s :6h
fold, fold,
G1ueggser raises to $2.01
fold, call,

FLOP ($4.27) :3s :kh :7s
check,
G1ueggser bets $3.04
mikedrum calls $3.04

TURN ($10.35) :6c
check,
G1ueggser bets $7.12
mikedrum calls $7.12

RIVER ($24.59) :5s
mikedrum bets $15.33
G