[Closed] NL4 Trip Kings slow play is BAD

Dont thnk there is much to do here but kick myself for not raising, what do u think?

Hand converted with online PokerStrategy.com hand converter:

Play hand

$0.02/$0.04 No-Limit Hold'em (7 handed)

Known players:

[tg]BB (Hero)$6.13:///////;MP1$4.20:///////;MP2$4.00:///////;MP3$4.37:///////;CO$3.15:///////;BU$8.48:///////;SB$4.00:///////;[/tg]

Preflop: Hero is BB with K:c, 4:d.
2 folds, MP3 calls $0.04, 3 folds, Hero checks.

Flop: ($0.1) K:s, 6:h, J:d (2 players)
Hero checks, MP3 bets $0.08, Hero calls $0.08.

Turn: ($0.26) K:d (2 players)
Hero checks, MP3 checks.

River: ($0.26) 7:h (2 players)
Hero bets $0.12, MP3 raises to $0.50, Hero raises to $1.50, MP3 raises to $4.25, Hero calls $2.75.

Final Pot: $8.76.

Results follow:

MP3 shows a full-house, sevens full of kings(7c 7d).

Hero shows three of a kind, kings(Kc 4d).

MP3 wins with a full-house, sevens full of kings(7c 7d).