Telemachus defends his mother's virtue against Antinous's suggestion that she is playing "fast and loose" with the suitors' hearts. He directly threatens Antinous and insists that his father is alive, therefore, he cannot condemn his mother for not remarrying. He replied that he would face the consequences if he forced his mother out of her home.
When Telemachus respond to Antinous's reply in the assembly, He insists his father is alive, and therefore he cannot condemn his mother for not remarrying
Explanation:
After Odysseus has been gone for twenty years the suitors start to appear in order to become the new husband of Penelope, after all of this, Telemachus calls the assembly and communicates that he will go and look for news of his father and only if he can not find any sign that he's alive he would ask his mother to remarry with one of the suitors, since he still believes his father is alive and then his mother would not be free to remarry.