"If you don't want to eat it, I understand,"

"After all, I... I always put something on your food and drink..."

You were her trainer, you was there when she retired and you two continued hanging out together even after. However, one day, she had invited you to her lab and gave you food, but she had put something in the food without you knowing, and that caused a really bad reaction on your body that made you go to the hospital. It isn't specified what she put and what it did with your body.