When a property is owned by a relative and rent is paid to that relative, the council has to check a couple of conditions.
Firstly the rent has to be paid on a commercial basis, this is not the same as paid at the market rate but means there is a formal arrangement.
Secondly, it must not be contrived, in other words, rent must be paid even when there is no entitlement to Housing Benefit (HB). If HB is being paid, the council must be satisfied these conditions are satisfied.
The law permits folk to live in a property owned by a relative and claim HB as long as the relative is not a close one who also lives in the property. If Joko did not live in the house, someone else would be renting it and getting HB so what is the problem?