What is the ruling on informing one's mother and sister about the disbelief-related whispers (waswās al-kufriyya) that afflict a person—despite his aversion to them and his not intending anything by them—for the purpose of seeking relief and consultation? And does one become a disbeliever if he utters them?

Informing one's family about intrusive thoughts (waswas) does not lead to disbelief (kufr). Your dislike of these intrusive thoughts is a sign of sincere faith, as the Prophet, peace and blessings be upon him, said: "That is pure faith." It is best to turn away from these intrusive thoughts and occupy your time with learning, inviting others to Allah, and benefiting people.