Humilated by aunty and mom

I was not good in study since my childhood and I want to be musicians instead of studious scholar. So since my childhood I have got bad marks in mathematics and science. And my mom –dad always wanted good marks from me. So when I was child I got spanking on bare bottoms every year for my study. But the worst thing had happened with me when I was in 9th class and my age was 15 years. My younger sister was in 7th standard and she was good in study and had got good marks. When my result of 9th class had declared I became failed in mathematics. I was afraid of this and did not want to tell anyone. but my sister was on the same school so she came to know about my results. And she told to my mom. When we both returned to home. Unfortunately on the same time my aunty who lives in same town had come in our home with their two kids. She asked our results from mom and mom told her with anger and agony. Then suddenly mom said that she is going to teach me a lesson. And now she would give me a bare bottom spanking in front of everyone. And then she asked to me to pull down my pants and undergarments. I did not want to do that but my mom and aunt both shouted on me. I pull down my pants and undergarments. I became nude in front mom, sister, aunty and their kids. Every one is watching my nude genitals and then my mom asked my sister to get her a wood ruler and then she spanked on my bare butts many time. But after that my aunty gave the stick in hand of my sister and asked her to spank on my butts. And my sister spanked on my nude butts a few times. After that she was smiling and I felled so humiliated and embarrassed after spanked by my younger sister in front of my aunty and mom. 3 years has been passed away since but I feel so humiliated and embarrassed till today