why does hector decide to stay and fight achilles

Hektor's mother doesn't want him to fight Achilles. She even exposes her breasts to remind him that she's his mother (yes that's very strange!). Hektor is angry that he didn't listen to Poulydamas's advice to guard the beach. Now thaAchilles has returned to battle Hektor doesn't want to look like a sissy pants. He wants to finally fight this guy and settle things.