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My continue her attitude of showing her breasts in public and she take bath in public like river, pind, etc. Showing her breasts to public. How to stop her?

10 years ago me and my mom travel in a rush train. there was a huge crowd in the compartments. we stand for whole journey of 2 hrs in the train. in the crowd at stations many people coming in and out to compartments where train stops at various stations. due to crowd peoples body touches others people. a man standing next to my mom very close to her from backwards when passengers come to our compartment he lost control and fell over my mom. when he fell, he pressed my moms one boob. he ask sorry to my mom and my mom react nothing. after some minutes that man again fell over my mom and this time he pressed my moms boob tightly and hold it for some seconds. my mom do nothing. i fell surprise on seeing this why mom do not react for that? after some minute that man voluntarily squeezed my moms boobs and my mom kept silent. what is the meaning for that? iam confused please anyone help me

It happens when im about ages of 13 or 14. one day our family go to tour in a train in unreserved coach. so the train compartment is little bit crowd. in fact my mom having habit of not wearing bra inside her blouse. on travel she wants to change her blouse due to unfit new blouse. she without shame or fear of strangers and other passengers in the same compartment she removed her blouse and flashed her naked breast. many people including men had seen my moms breasts on the go. it also happened when we bathing in public river when so many people there her full breasts exposed while bathing and changing clothes. it really irritating my mind now itself and now im 24 old. whwt can i do please help