I have also thought that it may be a child that the Evil Queen lost and not just a husband. It might be both though. I am just not sure if she really cared for her husband and instead just used her husband, Snow's father, to get power.
I think it would be interesting if the Evil Queen ended up being the miller's daughter from the original Rumpelstiltskin story. That sounds like a good idea to me. Maybe then she would have some sort of power over him because she said his name and he went through all these deals so he would end up in that cave jail to gain power over her by making her do what he said in the real world when he said please.
And he collected everything from everyone so that he would have these connections to the fairy tale world and they would help with his memories. Though so far things don't seem to be helping with peoples memories. Charming did notice the unicorn mobile, but Snow's ring doesn't seem to be helping her remember, but maybe it will by the end of the season. She does keep playing with it a lot.
Last thing, maybe the Evil Queen always had magic or got her magic from Rumpelstiltskin, but she learned how to control it or simply learned magic, if it is just spells and not something innate, from Maleficent the evil witch from Sleeping beauty that they showed in Episode 2. That would be interesting to me if the learning of magic was passed down. I liked how the two of them traded spells with each other. Though i don't really think they will do that in the master/apprentice sort of way, but just an idea.