Sister-in-law came out of the bathroom in the towel after bathing

The husband had gone to the office, sister-in-law and brother-in-law were alone in the house. After bathing, sister-in-law came out of the bathroom in the towel, seeing sister-in-law in the towel, the brother-in-law did not stay and he hugged his sister-in-law from behind and slowly the brother-in-law also opened the towel of the sister-in-law