There is so much that binds them together—a raging passion for Carnatic music, a soft spot for Mehdi Hassan ghazals, and the lure of cinema which they turn to when winding down for the day—and then there are aspects the two stand apart on, including who’s the better tennis player, Rafa or Federer.

Bombay Jayashri Ramnath and Amrit, 24, are mother-son, guru-shishya, and now, cool collaborators readying to perform on the same stage this January in Mumbai  for the annual event, CITI-NCPA Aadi Anant: From Here to Eternity. Perfect fits for the year’s theme, which celebrates mentor and mentee, the musicians say that it’s tough to draw the line, and separate one relationship from the other. “We feed on the same music. Our favourite is Tarun ahe ratra ajuni, a bhava song sung by Asha Bhosle,” Jayashri says, breaking into a line, before Amrit joins in. “Another of our favourites is Innum en manam, a composition by our guru,” she adds about late Carnatic violinist Lalgudi Jayaraman, who she first met in Chennai as a 24-year-old and credits for deepening her interest and research in music.