SW-199 If you show me such a disgusting body, I won't be able to bear it anymore, even though I'm your brother's wife...

I was so excited by the disgusting body of my brother's wife, who lives with me, that she showed me defenselessly, and I couldn't hold back anymore, so I pretended it was a coincidence and got close to my sister-in-law and rubbed my erect dick against her. She started to writhe in agony, so even though we thought she was being naughty, we both kept our voices low and had sex secretly so that my older brother who was nearby wouldn't find out.