They all beat Murugan, and Aishwarya's father wants her to remove the mangalyam tied by Murugan. Aishwarya fears that if she does not obey her father, then Murugan will be killed, so she agrees to marry another man to save Murugan's life.
This passage describes a situation where a young woman named Aishwarya is pressured by her father to marry someone else, all in order to save the life of Murugan.