hi,sorry to hear about this awful situation.Its important to try and get as much support and advice as possible at this time,make some phone calls to some of the contact numbers mentioned by other posters and get legal advice to see where you stand.
Im sure the UK Border Agency would be very sympathetic if you and your children are in a situation where you are at risk.Think about making a diary of events that have occured,do u have witnesses? Also you said that on one occasion the police were called,what was the result of this,was he arrested for example? All this could be important if you were to to apply for ILR on this basis.
take care
axis22
