Is money obtained from government support for the wife considered dubious, knowing that the grant contract stipulates that only the grant applicant may not seek assistance from the government, and his wife is not included in this condition?

If applying for assistance from the wife does not violate the regulations of the granting body, and there was no deceit or fraud, and the PhD scholarship was disclosed, and the granting body agreed to provide assistance, then this is permissible, and the money is lawful with no suspicion concerning it.