My mom was SH so many times. I feel helpless

Yesterday read a post where a boy's mom was SH by his cousin. So i showed that post to my mom and asked if she had such incidents. She said yes and told me everything.

Starting from class 8th, she went to her uncle's home and her uncle groped her and squeezed her chest. I feel so angry typing this my blood boils whenever i hear something like this especially given that it's my mom.

Then when she was going to college in bus, the ticket collector tried to touch her chest and many other people have touched her butt in bus during college days.

And the most shocking one was that my cousin too had SH her. I was so shocked hearing this. He's 34M and my mom is 38F. So after my mom and dad's marriage he had confessed an year later that he has a crush on her. She thought it was due to his age and ignored. 4-5 years later after this my dad and mom went to their house and my dad had some work, so my mom and cousin and his friend went to a theatre. Cousin's friend went to watch diff movie and cousin and mom watched the same movie and during the movie he tried to grab her chest in b/w and did it 4-5 times. My mom slapped him after getting out of the theatre. He cried and said it happened mistakenly and not to tell anyone else he'll commit sui***e.

Now I'll def beat him once he comes here. He's living in a different state but is coming next month. Now he'll face the consequences of his actions . I fucking hate people like these