Can a son-in-law perform Matru Navami Shradh for his mother-in-law?

Yes, a son-in-law (jamai) can perform Matru Navami Shradh for his mother-in-law, particularly if her own sons are unavailable or live abroad. The Dharma Shastra permits the son-in-law to act as karta in such situations, provided the Sankalp clearly names the deceased and her gotra. This practice has become more common as families are scattered globally. At Prayag Pandits, the pandit will guide the son-in-law through the correct procedure, ensuring all ritual requirements are properly fulfilled.