Everyone keeps pushing me to allow my cousin back into my life

Me and my cousin were raised as sisters. She was abused by her dad and her mom died when she was 4. I have spent so much of my life trying to have sympathy for her but is just so fucked up. When she was 20 she went to prison for fucking around with a 14 year old. She got out when she was 25 and went BACK when she was 31 for allowing men to have sex with her 5 year old daughter for money. She got back out of prison 2 years ago. She's 43 now and honestly I started distancing myself from her. Then she tried to sext my son 6 months ago and he's 13 so I was done. She apparently tried to commit suicide and my mom wants us all to be there for her as a family and I said no. My family keeps saying how she went through so much abuse at such a young age and I get it but she's in her 40's. At some point you gotta take responsibility for your own actions. Her abuse doesn't null and void her actions. My mom loves her like a daughter and hates the path she's gone down and really wants me there for her but I almost kicked her ass with the shit with my son. I just can't be around her.