AKs hits the flop, gets check-raised 3 handed

[automat]

> Hero posted small blind ($0.25)
> markotm posted big blind ($0.50)
> KukiMuki is waiting for the big blind to play
> Game # 1,249,517,058 starting.
> Dealing Hole Cards(Ah Kh )
> Andy-Ace called for $0.50
> monzo111 folded
> OLCS folded
> bagersalle folded
> doofus86 folded
> cornhusk raised for $2
> asia75 folded
> Hero called for $1.75
> markotm folded
> Andy-Ace called for $1.50
> Dealing the Flop(Ks 7h Qc )
> Hero checked
> Andy-Ace checked
> cornhusk bet for $3
> Hero called for $3
> Andy-Ace raised for $9.25
> cornhusk called for $6.25

Not sure what to make of that raise. I didnt bet and cornhusks bet may seem weak to villain so he may try to steal the pot. Aside from that possibility, is there any hand i beat that he check-raises with on that flop? My first guess was a set, but wouldn t he just flat call then?


ps i d love to use the converter but i doesnt seem to work for prima hh.