A/4s on the button

[Bluegrassplayer]

This hand gave me a bit of trouble last night at my house game, going to recreate as best as I can. This about 6 hours into the play, and the remaining players are deep stacked because we've already taken most of the dead money at the table. The table is full ring, but I'm just going to mention the 4 of us in the hand:

SB: $700 TAG, claims to be semi pro, but he's not quite that good.

Seat 6: $400 Probably best player here, very TAG, but has a very healthy fear of you as you've taken several hundred off him

Seat 8: $200 donkey, no idea why he's still here donating, just bought in again after

Button: $450

Preflop:

You are dealt A [img]/images/graemlins/spade.gif[/img] 4 [img]/images/graemlins/spade.gif[/img]

Seat 6 raises to 12, 8 calls, You call, SB calls.

Flop: ($48)

Q [img]/images/graemlins/diamond.gif[/img] 2 [img]/images/graemlins/spade.gif[/img] 3 [img]/images/graemlins/spade.gif[/img]

SB checks, Seat 6 bets $50, Seat 8 folds

What do I do here? Is this worth reraising?

Ultimately you decide to call.

SB calls as well.

Turn is: (198) A [img]/images/graemlins/club.gif[/img]

SB checks, Seat 6 bets $100

Once again confused as what to do here, do I push?