How's my line? Advice on all streets welcome. Am I going too far with TPNK in a blind war, or do I have the best hand here probably?

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) FTR converter on zerodivide.cx

UTG ($94.30)
MP ($75.35)
CO ($101.50)
Button ($42.50)
Hero ($98)
BB ($81.45)

Preflop: Hero is SB with K, 7.
4 folds, Hero raises to $4, BB calls $3.

Flop: ($8) 6, 2, K (2 players)
Hero bets $5, BB raises to $10, Hero calls $5.

Turn: ($28) 2 (2 players)
Hero checks, BB bets $10, Hero raises to $25......................