DH just called me when he finished work and i broke down in tears and told how i am feeling about it all. He surprisingly said to me he has been thinking about it since i brought it up last night and he agrees with me that the dog is not showing good signs. He said himself that that's how their other dog stared off before it went real bad and started attacking people.
So he is going to call his mum now to tell her if they are able to help us out then it will have to be at our house, where DS will be most comfortable anyways ... or otherwise we'll have to rely on someone else. Will be interesting what they say. I am more comfortable with laboring on my own than to have my son at their house, and ill be wondering the whole time if he is safe. Screw that!