What of the Children?

Oneshot. Epilogue compliant. It's nineteen years after the war, but not everything is as it seems. Severus Snape survived. Harry and Ginny got married...then divorced. And now Severus, Harry, and Harry's two oldest kids are all at Hogwarts together. But what's going on when the children aren't around? Warnings: slight Ginny bashing, SLASH, EXPLICIT CONTENT