The accident occurred when Mohan Swarup and his wife Asha (44) of Fatehpur Sikari were going to condole the death of a relative in Chamunda in Kotwali police station area.
When they reached the Goverdhan crossing and turned left towards Krishna Nagar, the Haryana Roadways bus hit their motorbike, killing Asha on the spot and injuring Mohan, police said.
Mohan was rushed to the district hospital where his condition was stated to be "stable".