Can you get housing benefit being on income support and living with close relative who pays the mortgage?
No you can’t, like someone above said the goverment expects families to look after there own and pay for the morgage whilst you live there themselves. If this is causing hardship for your family then you should look into renting somewhere yourself and applying for housing benefit for your own place. There are schemes around most areas that can also pay for a deposit if you haven’t the money, not everyone is entitled to this and it will be means tested if you do seek private rented accomdation. Go and speak to your local housing office and they can give you all the details you need.