So I read the previous thread (well, first 4 pages) and it seems that most people consider only two extremes: MMD wanted Drogo (and his child) dead from the beginning or she never wanted theme to die. However, what if the truth lies somewhere in between? What if she initially wanted to help Drogo, but later turned against him. I'm not claiming that this is defiantly what happened, I just think we should consider this option.
So, after Dany saved MMD she was really grateful (I'd guess that you will be grateful if someone stop you from being raped) and really wanted to help Drogo in gratitude for being saved by Dany. But then she when the emotion calmed down and she started thinking, she started to hate Dany and Drogo. Yes, she was saved, but for what? She was a slave, her people were dead. Drogo was to blame for slaughter, but Dany was to blame for extending her misery.
And thenDrogo fell from the horse and she was called into the tent. She quickly realized that Drogo will die and then Dany asked her to save him. When MMD told her that he's gone and Dany proposed blood magic, maybe something clicked in her and she started her revenge. I guess she knew (ok, this is crackpot) some sort of magic that demands to sacrifice something or someone really close Dany to bring Drogo back. Maybe she known that it will be Dany's child (sorry, forgot his name) or she didn't (she really wanted just someone close to Dany). So, she claimed that the horse is needed, even thought it was completely unnecessary and then she started a ritual, which would in the end ensure that Dany (or someone close to her) will enter the tent (yeah, I know, crackpot). So, what I'm saying that even if Jorah wouldn't carry her into the tent, something would happen that will result in Dany losing someone close (probably the child). And of course MMD knew all along that Drogo will turn in vegetable, so more revenge for her.
OTOH I don't know where to put the fact that she forbade to enter the tent. Maybe it was part of the ritual that the victim come into it uninvited? Well, I should stop before I wander to deep into this ...