I did go to colllege.... what reason can i give to the lecturer.?

Few days ago i did go to college. So what reason i can give to the lecturer in order to prevent her from sending warning letter to my parents. For your knowledge she hates me and i hate het too. I dont want my parents to know that i did go to college because in my family there so many problems now a day.Please give idea what can i do.I hope you guys understand my problem.