Caught Flush on River, but is it best?

[Wideout88]

Stage #252656817: Holdem No Limit $0.50 9-Handed

Relevant Stacks

Seat 6 - Villain ($190.90 in chips)
Seat 5 - Hero ($88.50 in chips)

SB - Posts small blind $0.50
BB - Posts big blind $1
*** POCKET CARDS ***

Dealt to Hero [Jc 10c]
MP2 - Calls $1
Hero - Raises $4 to $4
Villain - Calls $4
MP2 - Folds
*** FLOP *** [4c 6d Kc]
Hero - Bets $7
Villain - Calls $7
*** TURN *** [4c 6d Kc] [Kh]
Hero - Checks
Villain - Checks
*** RIVER *** [4c 6d Kc Kh] [5c]
Hero - Bets $20
Villain - All-In(Raise) $179.90 to $179.90

Call or Fold?
On the river there is about $120 in the middle and its $57 more to me to call, so getting 2 to 1 should I fold this?