AJs hand 2-4 NL

[Ionphore]

Just sat down for 400 - no reads on anyone, UTG has around 800...
I am dealt A [img]/images/graemlins/club.gif[/img]J [img]/images/graemlins/club.gif[/img] in UTG+1...
Utg limps - I limp folded to SB who completes, BB makes it 20 straight, UTG calls - so I call 16 more and SB folds.
$64 dollars in the pot and we see a flop.
It comes 8 [img]/images/graemlins/club.gif[/img] 10 [img]/images/graemlins/club.gif[/img] 9 [img]/images/graemlins/diamond.gif[/img]
SB Who I am reading for an overpair given his raise preflop was 1/4th of his stack and out of the blinds leads out for 20 bucks - rather weak. UTG +1 who has everyone covered makes it 138 to go. my read was that he spiked a set of nines or tens or possibly QJ. Figured he clicked the pot button and just want me to fold and the overpair to pay him off... So I push, BB folds, UTG calls pretty quickly...
Anyone else play this the same way? Or am I reaching with this one?