Q: What happens if you are supporting your parents by putting money directly in their account, yet you know the money is likely to be paying off a haram mortgage and insurance etc as well as other halal expenses?
A: If the support you provide your parents is used exclusively to perpetuate harām then this is not permissible. If the support you provide is subject to the discretion of your parents and may be used for either halāl or harām then you are not culpable for their use.