Looking for Snarry with side of Lucius/James

[sesshysgirl]

The story I am looking for how lucius and james are married and draco and harry are actually twins who to protect harry, james takes harry and "marries" lily. It is a couple of years after harry killed voldemort. James didn't die dumbledore had him somewhere with magic bonds that prevented him from leaving and snape knew where he was but coludn't help because he threatened snapes mom. Also before the final battle harry and snape sleep together but due do to an understanding harry decides to leave the uk along with hermione and sirius when he learns he is pregant with snapes child.

thanks for the help