My mom was once cheating . Is it compulsory for me to show love and care her

Assalamu alaikum ,I am 20yrs old now.i am from india ,My father is still working in Riyadh and he visits us 2years once and also he privide us whatever my family needs. when i was 11 i found out my mom cheating with neighbor who was 24yrs old at that time . I found out when they talking double meaning & flirting in front of me . Also found messages (text) that man sent to my mother [ i wont live without you , talk to me , pick my phone ] . And even she went to his marriage 2yrs later and present him Table fan . Now she has no connection with him . I have not told this to anyone till now. I think she regret what she had done and even she prays and read quran now The question is ... Now she is suffering ill and i have no sympathy or empathy for her. Is it compulsory for me to show love and care towards her .