Taking our brothers and sisters seriously would rule out flirting with them or doing anything that would make a brother or a sister feel uncomfortable around us.
وَهذَا ٱلْأَمْرُ مُهِمٌّ خُصُوصًا فِي تَعَامُلِنَا مَعَ ٱلْجِنْسِ ٱلْآخَرِ .‏