I'd check the turn, you just don't fold out many better hands without firing 2 here and that's usually a bad idea when people can't fold like TT etc, he probably c/cs KQ etc some % of the time and like Daven says SB has a fairly strong range and all set combos.

Pre looks fine. If MP has a low c bet stat or youve seen him give up multiwayhere before flop is likely a fold. If not then calling will be alright.