Shortstacked live hand

[Supwithbates]

Juicy live home game with a bad structure. Table is incredibly loose/passive, and I think winrates of 100ish BB/100 are sustainable here. Structure is 20$ buyin, .25/.50 blinds, so everyone is shortstacked.
Because the play structure is so shortstacked, underbetting is the standard at this table.

I haven't played with this group in about 6 months so my reads are rusty. I'll do my best.

7 handed:
UTG limps(passive/loose), UTG+1(tight/aggressive but bad) raises to $1.5, 1 fold, CO calls, I call on the button with A[img]/images/graemlins/club.gif[/img]T[img]/images/graemlins/club.gif[/img], SB folds, BB calls, UTG folds.
As the flop comes out (We had someone dealing that didn't want to play) the burn-card is accidentally revealed to one player, so it's flipped up to the table and is 9[img]/images/graemlins/club.gif[/img]

Flop (6.5$)
J[img]/images/graemlins/club.gif[/img]8[img]/images/graemlins/club.gif[/img]5[img]/images/graemlins/diamond.gif[/img]
BB leads for .75$ (yes, I know), UTG+1 calls, CO calls, I consider raising and then realize that I'm never folding out a Jack and just call.
BB is very loose and bets a lot, but always too small. Likes to bluff but bad at it. UTG+1 is fairly tight for the bunch, but not that positionally aware and is pretty terrible postflop. CO is straightforward and tight/passive.

Turn is A[img]/images/graemlins/heart.gif[/img].
Pot is ~9$. Turn checks around to you on the button. I lead for 5$, BB folds, original raiser check/minraises to 11.5$. He has $4.5 behind. Our read is that he is mostly tight-aggressive and bad. I think his range does include some weaker aces but not many, and I think AJ is a possible holding for him but he might raise flop since it's such a small bet. He might not though.

All-in, fold, call?