The following is pure conjecture and my opinion only, so take it for what it's worth. Approx. $.02
Looking way back through the mom's social media I'm pretty sure that Martens is her maiden name. Being as that is also Victoria's last name, I'm going out on a limb and guess that her father is not involved? Just a hunch. I also saw reference way back in her social media to having a husband at one point, so I'm also going to guess that the other child may be that man's child, which would make sense because I read someone online somewhere state that the boy was with his father when all of this took place.
There was also a period of time that Michelle seemed to be very, very religious. This raises my radar just a bit and makes me wonder if she was a drug user before. I say this because as I mentioned up thread, I have a lifelong on and off again meth addict brother (who has also been in and out of prison) and each and
every time he "gets clean" he finds religion and gets REALLY into it. I haven't figured out if it's because he really means it or if it's because he knows that was always the ticket to keep my parents (especially my mother) helping him....as in paying for bail, rehabs, lawyers, talking people he stole from out of pressing charges (by reimbursing them for their stolen items), giving him a place to live when he got out of jail, etc. In other words, they could have just washed their hands of him (and should have) but he would lure them in with his newfound "Godliness". Each.And.Every.Time. And he was always real super over the top with it when he was in one of those states. Makes me wonder if her religion wasn't for the same reasons? It keeps people helping you.
Of course, I may also be barking totally up the wrong tree. Just some thoughts I've been having. MOO.