I'm wondering if "selling" isn't "selling" in the sense of a change of...ownership...(blech) and instead in terms of prostitution. I truly don't believe AD was selling Shaniya. I think she was selling her body. It's despicable and disturbing, but I think the human trafficking charge has people picturing this crime as little Shaniya getting sold into a sex ring.
My theory is that MAM is a straight-up sick pedophile. Drug-addled and looking for money, Antoinette decides that since she can't sell herself pregnant, then Shaniya is an asset. It's always been bizarre to me that AD would have moved her to the couch, if it indeed happened. I think it's like a previous poster said--Shaniya was there for the pick up and bonus! He wouldn't even have to wake AD up. Probably better not to think about it and not mess up her sleep with guilt.
I don't believe the intent was to molest Shaniya there. There were potential witnesses in that trailer. Better to get her out of the house, and the disgusting perv decides to take her to a hotel like Johns often do. Nevermind that she's five.
Shaniya was probably traumatized, screaming, verbal, whatever, and with his urges fulfilled he saw her as a risk. She was drawing attention and she would just tell someone later. Whether AD just never thought about the scenario or didn't care, I don't know. Maybe she told him to bring her back when he was through. Maybe this plan was hatched when she was out of her mind with drugs. But her appearance in court just didn't give me the vibe of someone who just never thought this could happen.
I bet she pimped her out for drugs, and that was quite an expensive high. Dead little girl and prison. I don't think she was gone enough to not know this was a potentiality, though. I think she had the girl for three weeks, didn't form a bond, saw her as expendable (another child and one on the way) and maybe held some resentment toward dad.
Either way, I don't think this was ever supposed to be a sale. I don't think MAM was an intermediary. I think he was the john, AD was the pimp, and Shaniya was the commodity.