BB is aggro villain. CO no reads. So CO open, I call and BB call. We are around 170bb deep so call is only reasonable option on flop. BB calls behind.

Turn BB suddenly donk bets and this kind of look like some QJxx or some strong draw like KQTx+dd. Of course some QQxx are possible. When CO only call perhaps I should just raise now or would that be overplay? I dont really think BB is planning to fold though. But when CO only call I think bigger sets are unlikely.
Well in game I was hesitant to go for pot raise and just called again.

Very good river overall and have to call.

But yeah my plan was to only call versus CO second barrel on turn. But when it goes like this that BB donk and CO only call I think I should just raise and hope for best?