Jaiwardhan, a parliamentarian from Raghogarh constituency, said, “I think it is a highly personal matter about which I would not like to say anything.”
"However, I would like to say that my father has my full support," he added.
Earlier on Wednesday, 67-year-old Digvijay announced on micro-blogging website Twitter that he was in a relationship with TV anchor Amrita Rai.
“I have no hesitation in accepting my relationship with Amrita Rai. She and her husband have already filed a mutual consent divorce case,” Singh tweeted.
Jaiwardhan, who studied in US, was elected last year to the state assembly from Raghogarh constituency in Guna district from where Digvijay was elected for the first time way back in 1977.