قَالَ مَالِك : لَيْسَ عَلَى الرَّجُلِ يَنْظُرُ إِلَى شَعَرِ امْرَأَةِ ابْنِهِ أَوْ شَعَرِ أُمِّ امْرَأَتِهِ بَأْسٌ
Imam Malik, may Allah have mercy on him, said that there is nothing objectionable in looking at the hair of one's daughter-in-law or mother-in-law.