EV + or - and why

[houstonCT]

Playing a 1-2 nl cash game saturday night. I get JJ MP. Two limpers in front of me, I raise to 12$. Standard raises had been 8-10$. Guy next to me calls, BB calls and one of the EP limpers calls.

Flop is J-9-8 rainbow. Checked to me, I check, knowing he will take a stab and I will C/R him. Next to me bets 15$. Folds back to me. I raise an additional 35$ to see where he is. He immediately goes all in. I look at him and say " do you mean to tell me you called that raise with a Q-10?" to see if i could get anything out of him. Not that it would have done me much good, just testing. Nothing.

I couldnt lay it down if my life depended on it. I call, he flips Q-10o.

I had about 350$ he has about 125$, so not to big of a hit, but it hurt still, I had started with 150$.

How often does top set win with a gut buster straight on the board after the flop?

Is it ever EV+ to lay that down?

Thanks.