Okay this just occurred to me;
I had this strange notion that the Butterfly Brooch grants the user to turn his butterflies into humans. Not only that, but I believe that Tom and Sabine are two of them!
People blogged that Hawk Moth is Marinette's true father. I believe, somehow, the Miraculouses can also alter memories of people. Marinette's memories of her real father was erased because he didn't want her involved in his mission. He also didn't want her to feel left out so he sent his butterflies to watch over her.
Man, I could almost feel what Mari would feel if she ever finds out that Hawk Moth is her real father. Of course, that's up to the show's creators.
But really, how would Adrien react? ;)
Just so you know, Hawk Moth wasn't married to Adrien's mom. That would ruin my theory. I bet she was one of the friends he lost in a tragedy that led him to become the villain he is now. The tragedy was also the same tragedy that took Marinette's true mother away.