I get so upset

My MIL, whom I don’t like, not one bit, has texted me everyday asking “how are you doing? I know you miss your baby. It must be so hard. That’s a working moms life. Hopefully one day you can stay home.” (Not the same message but definitely the same point she’s trying to make) and I am just like “yes you dumb idiot. It’s hard AND I, who am breathing and living it know it and don’t need to reminded that my baby in daycare. (But i don’t feel shame because it has to be done) maybe I just get mad that she’s the one reminding me.