Dona Herlinda and Her Son (1985)

Rodolfo ( Marco Treviño ) is a young bachelor doctor who has a love affair with a younger music student, Ramon ( Arturo Meza ). When Rodolfo's mother begins to urge his son to get married, he quickly asks modern and open-mind Olga ( Letícia Lupercio ) to become his wife. Ramon is heart-broken, but Dona Herlinda ( Guadalupe Del Toro ) has the final solution to make everybody happy: She asks Ramon to live with her, near by Rodolfo and Olga. Everybody together forever.