Sanity check

The usual 100NL fishing hole

6 handed, but there are empty seats.

Loose/horrible - $100ish plays over 50%ish of his hands pre-flop. Tends to fold misses, but his pre-flop loose/passive play really forces him to call with weak hands post-flop. He had a nearly $300 stack he built luck-boxing with weird hands the that's been chipped down via his loose calls on early streets followed by folds.
Unknown - $55ish
I cover.

I was pushing loose/horrible around. He started giving me the action and loose post-flop calls, so I've geared down and have even started over-limping some hands.

Loose/horrible limps
Unknown raises to $3
I call on the button with AK
Blinds fold.

3 to the flop, $10 in the pot.
Q J T
Horrible checks, Unknown bets $2, I raise to $10...

Hmmmmmmmmm.. nice flop. Hopefully horrible gives you some action in the form of a check-reraise. Ditto with unknown on the reraise. Obviously the goal here is to get it all-in on the flop which I'm sure I don't have to tell you.

That said.. you are giving unknown nearly 3:1 here if horrible folds and better than 3:1 if horrible calls when you have a vulnerable hand considering the board.. I think I might bump it up a bit more on the flop.

a Q J T or heart, even an A or K on the turn would suck.

Plan for the rest of the hand depends on the rest of the action on the flop. If somebody 3-bets here then you 4-bet them. If you have to play the turn, it kinda depends on the action on the flop. I don't really have the desire to go about how I'd play it with all the different possiblities that could still happen on the flop...