I’m not getting help !!!

I’m sick and tired of helping my little sister do her homework while I’m in class on zoom trying to take notes and do my own homework while my mom just lays down and texts/ calls her “lover” & family all day . And my other sister doesn’t do her own homework but also doesn’t help neither ! My mom is not strict to any of them .

my little sister got behind two weeks because we were stuck in another country so she has to catch up but it’s hard when her own mom is not enforcing her to do work and just letting her do whatever she wants .

I just hope I do well enough in teaching my little sister and helping her complete her homework and classwork so she could pass . if she fails I feel like it will be on me .