The mother is sick/dying/poor. The son is a rowdy or a slacker. The romantic lead (heroine) arrives as a catalyst to fix the son so he can serve the mother better.
In Muthu , the entire romantic storyline between Rajinikanth and Meena hinges on a massive misunderstanding: Mother is dead, but the servant (Ranganayaki) raised him. The heroine initially falls for him not knowing his royal lineage. However, the climax is not the kiss; it is the reunion with the mother figure. The romantic track pauses for a 10-minute sequence where the hero cries, "Amma endru azhaikatha uyir illaye" (There is no life that doesn't cry out for a mother). Www tamil sex amma magan
For every hundred films where the mother weeps and the son beats up the villain, there is a quiet moment—like in 96 (2018)—where the hero mentions his mother in passing, and you realize that even nostalgia is filtered through her. The romantic storyline succeeds not when it ignores the mother, but when it convinces the audience that the heroine has earned a place next to that sacred bond, never above it. The mother is sick/dying/poor