My towel dropped in front of my cousin

This is a true story that happened in my life

I'm 24 year old, it was the day when my brother (17) broke his arm and I was helping him before taking bath myself . Even though my brother and me are always not on good terms I had to help him. I took him to the bathroom and undressed him (he had also hit his back but not serious) he sat on the chair I had brought to the bathroom and I started bathing him. In between the bath I realised even though my brother is 7 years younger than me his dick was double my size almost like 8 or 9 inches ( mine reaches almost 4 when hard) suddenly my cousin who is 2 years older than my brother opened the door, I forgot to close because I thought we were alone. But she had came to visit my brother. She was shocked to see Mr brother's dick and stared some times on to it. For fun I raised him and showed her his dick more clearly, she was stunned. She immediately closed her eyes with her hand. My brother didn't let this slide he galrabbed my towel and snatched it. She was stunned to speak the same girl who felt shy seeing my brother's dick laughed at mine. My brother was also laughing and said "that's it? " My cousing looked both our dock simultaneously and gestured a tiny act with her hand to me. I immediately closed the door. I have never felt that ashamed in my life