$0.02/$0.05

SB: $6.25 (125 bb)
Hero (BB): $5.76 (115.2 bb)
UTG: $2.53 (50.6 bb)
MP: $4.43 (88.6 bb)
CO: $6.93 (138.6 bb)
BTN: $5.76 (115.2 bb)

Villain unknown

Preflop: Hero is BB with Kd Kh
2 folds, CO raises to $0.15, 2 folds, Hero raises to $0.50, CO calls $0.35

Flop: ($1.02) 7c 3c 8s (2 players)
Hero bets $0.60, CO raises to $1.45, Hero ?

Thoughts on flop? With the range I gave him we're getting the right price. Though I think sometimes he has AA, then we're not. Don't really know what to do given we oop and awkward SPR.
Honestly think it's a fold, nitty but it is with no info.