i have 2 children. my daughter is 4 and my son is 9. i also have a step daughter who is 13. at the moment the girls are sharing despite the age gap cos i would rather that than 1 of them have to share with a boy. i know by law my 2 could still share until my son is 10 but this doesn't seem right to me. if i applied to the housing would they just allow me another 3 bed house or would i be allowed a 4.....if 1 was available?