I was seriously surprised at the darkness of this and how much I liked it. This is something I could see Severus doing, from training Harry to be a good lover to sleeping with someone he doesn't truly care about and living in another body just to reap the benefits.
And how he handled his pregnancies is so Severus. It's no wonder he didn't truly consider them his children since they would be Ginny's.
*shudders*
Honestly, I really liked this. Please keep writing.