Pass up a coinflip here getting under 2:1?

[thebeebster]

played on laptop so no HH. stars 1/2 6 max.
stacks: sb has 110, bb 230 and i cover.

i make it 8 on the button with 7 [img]/images/graemlins/diamond.gif[/img]4 [img]/images/graemlins/diamond.gif[/img]
crappy supernit in SB hasn't played a hand since he lost 80 with QQ, he makes it 18. this means he has QQ+. most likely KK or AA.

BB donk calls. this means he has a pair from 9-Q. i call.

flop comes good for me. 7[img]/images/graemlins/club.gif[/img]3 [img]/images/graemlins/diamond.gif[/img]2 [img]/images/graemlins/diamond.gif[/img]

SB bets 45, BB shoves. i'm pretty confident in my reads. if sb has AA he'll have a straight redraw if i make two pair to go with his two pair draw. plus both have a chance to flush redraw if i make my flush. i'm happy to gamble if sb is a full stack, but should i pass here?