AKo on the Button ( Very LAG )

OK, this was really early on, before I had played 20 hands. I had been raising a lot though, playing very LAG. Up until now, the BB had played fairly tight, this was the first time I had seen him donk bet.

PokerStars No-Limit Hold'em, $0.02 BB (6 handed) - Converter Tool

MP ($3.03)
CO ($1.61)
Hero (Button) ($2.38)
SB ($1.42)
BB ($1.21)
UTG ($1.43)

Preflop: Hero is Button with A[IMG], K[IMG]
3 folds, Hero bets $0.06, 1 fold, BB calls $0.04

Flop: ($0.13) 6[IMG], Q[IMG], K[IMG] (2 players)
BB bets $0.10, Hero ???

Again, I apologize if this is stupidly straight forward, just trying to learn. Also apologize for lack of stats/info.