My husbands ex wouldn't allow us to have his son's medical done for the sponsorship so we were given the PR without his son and he signed to renounce the sponsorship of his son. The ex is NOW saying she will allow him to have the medical done. Can this be done? Should we try to apply for a visitors visa instead? How can we go about adding him if it is possible? Any help would be appreciated. I should mention they are from Cuba.