Replying to HELPPPP

Yesterday I told my math teacher I couldnt take a test because i had a family crisis last night and i didnt have time to study. being a nice teacher she gave me another day to study and i did. this morning my mom was subbing at school and my teacher saw her and asked her if everything was ok. Well now im fucked because my teacher knows i lied. i took the test and did well..... but my teacher wants me to think of a punishment. if i dont its possible shell go to the principle and file some academic integrity shit i cant have any of that. i need some ideas for a punishment i can do. i have football right after school so i cant do anything after school. PLEASE HELP ME!