Is a man considered a Dayyuth if he stands with his sister and her female friends who are young men at the university, believing them to be normal, respectable friends with no romantic relationships between them?

The dayouth is one who lacks jealousy over his family and his mahram relatives, and who accepts indecency, allowing men to enter his حرمة (sacred privacy/sanctum). Allah has forbidden Paradise to three types of people, among them the dayouth, who condones evil among his family. The befriending of girls by men is a great temptation and widespread evil. A Muslim must protect himself and his family from the Fire. A man standing with his sister and her female friends at university is considered a type of dayouth.