Have there been any Hadith indicating the inclination of the Mothers of the Believers towards the Prophet's children, or the desire of any of them to have children with him? And is it true that Maria al-Qibtiyya was the mother of his son Ibrahim, and why is she not mentioned among his wives?

There is no explicit text from the Mothers of the Believers expressing their desire to have children with the Messenger of Allah, peace and blessings be upon him. However, their love, jealousy, and pride in being married to him suggest this, due to people's innate love for children, especially from noble origins.

The Messenger of Allah, peace and blessings be upon him, loved children and showed them mercy. He was blessed with children from Khadijah, may Allah be pleased with her, as narrated in the hadith of Aisha: "Allah did not give me a better substitute than her; she believed in me when people disbelieved in me, she affirmed me when people denied me, she supported me with her wealth when people deprived me, and Allah, the Mighty and Majestic, blessed me with her children when He deprived me of the children of other women."