I have a male villager doing the same thing. Interesting thing is I never set him to Parenting nor did I ever intentionally breed him. He did it all on his own one night while I didn't even have VV2 up. I woke up to all these nursing mothers! He breed so much that he ended up mastering in Parenting in that one night!
Fortunately, he's stopped his constant breeding so I've managed to get all the villagers, including the females, to Esteemed Elder status before they die. But now I have all of his kids running around! Argh!
He's also interesting in that I have no idea how he arrived. I don't remember any village event that created him, but he did not have any parents displayed as a child. I have no idea where he came from! He just arrived, grew up, and had one heck of a night with the ladies!