I, DH and 3 DC have been staying with my mother and stepfather for the past few weeks. We have recently returned from living abroad. We sold out house here to emigrate but things went badly wrong so we have had to come back and as we had nowhere else to stay, they took us in (stepfather grudgingly). We have asked them to lend us some money to rent a house of our own as the house we bought abroad has still not sold. DH has now found a job but we have not been able to save enough for a deposit and a month's rent as we have had to kit out the DC with school uniforms and buy a very ancient and cheap car for DH to get to work. They have refused and said we will have to stay with them until we get enough money of our own.
The reason I am desperate to leave is that I feel like a little kid again and my stepfather has made it crystal clear that he does not want us here constantly correcting DCs and criticising my parenting, complaining about tiniest mess DC make, telling me our situation is my own fault (as if I don't feel shit enough already, we have lost £000's) and making me feel like we are intruding in 'his' house.
Last straw yesterday was him shouting at me as 4 year old DS forgot to flush the toilet (poo) in front of DS, telling me how terribly I have brought up my DC and how I should have respect for his house etc. I just lost it and told him what I thought of him, how petty he was and always has been, that I owed him nothing and what an uptight arsehole he was 
. Neither of them have said a word to me since then.
He has been my stepfather since I was 7 and we have never had much of a relationship as he is emotionally distant and very anal about everything (military man). He has also physically punished me as a child (walloped etc). I actually can't stand him but have been conditioned to be extremely grateful to him for 'bringing me up', not that I had any choice in the matter. My mother had further DC with him and favouritism is very plain to see. I left home at 18 to escape it and had spent over 20 years away until we ended up with nowhere to go and needed their help. I am furious at myself for taking it. We have another 2/3 weeks until we can afford to move out. I don't know how to cope 
.
Council will not help as we own a property abroad and they need a letter from mother/stepfather saying that they are kicking us out and they won't do that.