I wouldn't raise this hand preflop, everyone would call and you don't have much of an edge, if any. Maybe MP is passive preflop and limped with AT or better and is raising TPGK here on the turn. In a pot this small, I think we can make a case for folding the turn. If you want to call the turn, almost any line would be better than bet/call on the river. There is four to a straight on the board, three to a flush, you got raised on the turn...I don't think he flips up two pair without the ace much of the time. The limit this is at would help.