Purity: Husband's Responsibility for Wife's Kafan
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 563:
It is the husband's responsibility to provide the kafan for his wife even if she has her own wealth. Similarly, if a woman is given a revocable divorce (al‑ṭalāq al‑rijʿī) – which will be explained in the section on the rules of divorce – and she dies before the expiry of her prescribed waiting period (ʿiddah), her husband must provide the kafan for her. In the event that her husband is not bāligh or is insane, the guardian of the husband must provide the wife’s kafan from the husband’s estate.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)