Hi MellowMa..... so you have left BIGMALE dog behind then!!
It does sound like she has become unsettled and maybe trying to establish a place above you and the children. Maybe her season and the move haven't helped. How long ago did the season start? She may be going into a phantom, is she carrying toys around sleeping with them more or getting possesive about her toys? Do her teats look a bit more swollen or if they could be filling up with milk?
You need to do everything to keep her bottom of the pile as it were. So this pretty much means not allowing her into a 'higher' position that the children. So DC come up for cuddles but not her, don't let her on the furniture, don't let her upstairs or on your beds etc all this helps keep her in her place. When you come in from a walk with her you all go in the door first and she waits then comes in, not her charge in first in front of all of you. Certainly I am guessing that her hormones and the move won't have helped. Were you a bit more precious with her whilst all this was going on, this may have led her to think that she is creeping up the pecking order. Just ideas really, very difficult to know without seeing the situation. If she came from a reputable breeder would they be able to give you advice? Anyone else you know from the breed that could help. Local dog trainers. When I had problems with my dog I went to the vet who recommended someone. I phoned them and they gave me phone advice and would have also visited if I had needed it. The phone advice was free but the visit would have cost, but its well worth it.
If you do think she might be having a phantom, then she needs to have the toys taken away from her (I had to hide all of my DC's dolls and cuddly toys when my bitch had a phantom else she tried to feed them), cut her food down a bit and get her out for loads of walks to take her mind off it.