Should I have said something?

My trainer today spilled a bunch of oil on the floor. She didn't get a chance to clean it up. Our manager walked in while she was on break and assumed it was me. I swept it up to a manageable amount for him, and then he told me I'm responsible for cleaning the floor at the end of the day. I just said okay.

Then I texted my trainer, "Manager told me I'm responsible for cleaning the floor. I didn't tell him it was you." She laughed, said she'll clean it (which she did), and thanked me.

Did I do the right thing? 😆