[droolie]

I bet the river and call a raise. I think it's likely he has a set of J's but is concerned you have a made str8. His stop n gos scream protection raises.

I bet the river on the chance he has AJ or AK and wants a cheap showdown.

Given the fact that you checked if villian bets and MP3 calls I check raise (villian will not reraise and we'll get more $$ out of MP3 when we're ahead)

If MP3 folds I just call. I think this is a coin flip between you and villian.