Think of the Children

Complete AU. Years after the war, Severus is Harry's dear friend, and beloved babysitter for his three kids. When they find out that Ginny has committed atrocities Harry had never suspected, he turns to the first and only person he can think of to help him fix it. And the kids really do love the Potions Master. So when his sons ask him about marriage, what is he to say? SSHP